Most blinds in this city are not worn out when they are replaced. They are dirty, and they have been cleaned in a way that damaged them. A roller that was taken down and soaked. A wooden blind wiped with a wet cloth once too often. A honeycomb fitted in a kitchen, where nothing can reach the inside of the cells. We have been furnishing Kolkata homes from 46 Central Avenue since 1971, and a fair share of the blinds we are asked to replace would have lasted years longer if somebody had known which cloth to use.
What follows is the practical version: what the dust here actually is, what each type of blind will tolerate, and the small weekly habit that makes the annual deep clean almost unnecessary.
Kolkata dust is not ordinary dust
Every cleaning guide you will find online was written somewhere else, and it assumes dust is dry, grey and loose — the sort that lifts off with a feather duster. On a window facing Central Avenue, APC Road, or any road carrying buses and autos, it is not. It is traffic soot, and it arrives with an oily film that bonds to the surface. Add construction dust from the building going up two lanes away and you have a deposit that a dry duster pushes around rather than removes.
This has one practical consequence. On a street-facing window, dry dusting stops working after about three or four weeks, and the film that is left behind is what eventually turns a cream blind grey in a way no cleaning will reverse. The fix is not a stronger cleaner. It is doing the light clean often enough that the film never forms. A blind on a quiet inner courtyard or a rear bedroom is a different case entirely and can go much longer between attentions.
The same logic applies to kitchens, where the deposit is cooking oil rather than traffic oil, and behaves identically. This is the single strongest argument for specifying waterproof PVC in a kitchen or bathroom rather than fabric — not because fabric fails, but because PVC can be washed and fabric cannot. It is the same reasoning that makes PVC the default in commercial kitchens and factory floors.
The weekly habit that prevents almost every deep clean
Close the blind fully so the surface becomes one flat plane. Starting at the top and working down in one direction, take a dry microfibre cloth across it. Then tilt the slats the other way, if it has slats, and repeat. It takes two minutes a window.
Two details matter more than people expect. Work top to bottom, because working upwards drops everything you have collected onto the part you have already done. And use microfibre rather than cotton or a feather duster — microfibre holds the particles instead of launching them into the room and back onto the blind an hour later. A vacuum with a soft brush attachment on low suction does the same job faster on wide windows, and is the better tool for vertical vanes and fabric.
Do this weekly on street-facing windows and fortnightly elsewhere, and most blinds in most homes will never need anything more aggressive.
Wet cleaning: what can take it, and what cannot
This is where the damage happens, because the honest answer varies completely by material and almost nobody separates them.
| Blind type | Routine care | Can it take water? | The mistake to avoid |
|---|---|---|---|
| PVC / vinyl roller | Dry microfibre weekly | Yes — damp cloth, mild soap, wiped in place | Taking it down and soaking it |
| Fabric roller | Dry microfibre or vacuum on low | Spot-clean only, lightly damp | Rubbing hard — it lifts the stiffening coating and the edges go wavy |
| Wooden / faux-wood Venetian | Dry microfibre, slats closed both ways | No on real wood. A barely damp cloth on faux-wood | A wet cloth on real timber — the slat swells and the warp is permanent |
| Bamboo / woven | Dry brush or vacuum, following the weave | No | Any water at all, and scrubbing across the weave |
| Roman (fabric) | Vacuum on low with the Roman blind lowered flat | Spot-clean only | Washing the panel — it will never hang square again |
| Vertical (PVC vanes) | Wipe each vane top to bottom, one hand behind it | Yes on PVC vanes | Letting the cloth drag the vane off its carrier hook |
| Zebra / day-night | Dry microfibre, both bands, blind fully closed | Light spot-clean only | Scrubbing at the join between the sheer and solid bands |
| Honeycomb / cellular | Vacuum on low across the face, or compressed air through the cells | No | Anything wet — you cannot dry the inside of a cell |
Never take a roller blind down and soak it
This is the most common and most expensive mistake, and it is worth explaining why rather than just saying don’t.
A roller blind’s fabric is held flat and square by a stiffening coating. Submerge it and that coating begins to dissolve, which is why a soaked roller comes back with edges that ripple and a hem that no longer sits straight. Worse, a roller blind that goes back on its tube while still even slightly damp traps that moisture inside a tight roll, in a city that is humid for half the year. Mildew grows in the roll where nobody can see it, and by the time the spotting shows on the face of the fabric it has gone through the weave and will not come out.
If a PVC roller needs more than dusting, clean it hanging, in place. Lower it fully, wipe it with a cloth wrung out in mild soapy water, go over it again with a cloth wrung out in clean water, and leave it lowered with the window open until it is completely dry to the touch before you roll it up. That last instruction is the one people skip.
Wooden and bamboo blinds: dry only, always
Real timber slats are the least forgiving thing on a window. Wood takes up water, swells unevenly across its width, and dries back into a shape it did not start in. One genuinely wet cloth can put a permanent cup or twist into a slat, and once a few slats have twisted the blind never closes flush again.
So: dry microfibre, or a vacuum brush, and nothing else as routine. For a mark that will not lift, a cloth with the barest trace of furniture polish or a wood-safe cleaner, worked along the grain, on that slat only. The same discipline applies to bamboo and woven-wood blinds, with the added point that you should brush along the weave rather than across it, because brushing across it works the fibres loose over time.
Faux-wood is the compromise, and it is a real one. It looks close to timber, it tolerates a damp cloth, and in a Kolkata kitchen or a bathroom it is the sensible specification. We keep both in the showroom precisely so people can decide that with the two in front of them — our guide to wooden blinds sets out how the two differ beyond cleaning.
Honeycomb and zebra: the two you cannot scrub
A honeycomb blind’s whole virtue is the sealed air pocket in each cell, and that pocket is open at the sides. Anything wet gets in and cannot be dried out, and anything greasy that gets in stays. Vacuum the face on low suction, or blow the cells through with compressed air, and accept that a honeycomb is a bedroom and living-room product. It should never be specified over a hob. That is the same conclusion we reach in our guide to honeycomb blinds, and cleaning is the reason.
Zebra blinds have a different vulnerability. The alternating sheer and solid bands are joined along their length, and that join is the weakest line in the fabric. Dust it closed and flat, with a dry cloth and no pressure. Scrub at it and the bands separate, which cannot be repaired — the blind has to be remade. Our zebra blinds guide covers where they belong in a house; this is the maintenance half of the same answer.
The mechanism gets dirty faster than the fabric does
Here is the fault we are called about most: a roller blind that will not hold its position, or creeps down a few inches on its own. Almost every time, the owner thinks the blind has failed. Almost every time, the clutch is full of dust.
A chain-driven roller works on a small friction clutch at one end of the tube. Fine dust packs into it, the friction surfaces glaze, and the blind stops gripping. The same happens in the tilt mechanism of a Venetian and in the carriers of a vertical blind, where a gritty track is why vanes start to drag or refuse to turn together.
When you do the weekly dust, spend fifteen seconds on the headrail as well as the fabric — along the top of the box, into the bracket at each end, and down the chain or cord. A dry brush is enough. Do not oil it. Oil in a friction clutch is precisely the wrong thing, and a lubricated track simply collects more dust and sets into a paste. If a blind has already reached the stage of slipping, it usually needs opening and cleaning properly rather than anything bought in a bottle.
On a motorised blind, keep everything wet well away from the motor end and the battery housing, and never spray a cleaner towards the headrail. Wipe the fabric, not the hardware. There is more on living with them in our motorised blinds guide and on the motorised blinds page.
Grilles, ACs and cleaning a blind you cannot get behind
Almost every window in this city has a safety grille, and a good number carry a window AC unit. Both change how a blind is cleaned, and no imported guide mentions either.
A blind fitted outside the reveal, over a grille, has a gap behind it that collects everything the window lets in. That gap is where dust settles, and it is the part nobody cleans. Once a month, raise the blind fully, wipe the sill and the grille bars behind it, and let the sill dry before lowering the blind again — otherwise you are simply lowering clean fabric onto a dirty ledge.
Around a window AC, the air being pushed past the blind carries condensate and the fine grit that collects on the unit’s own grille. Fabric near an AC discolours faster than anywhere else in the room, which is a strong reason to put a wipeable PVC roller on that particular window even if the rest of the room is fabric. Where the grille sits and where the AC sits also determines whether a blind can be inside-fitted at all, which we cover in our guide to measuring for blinds.
Monsoon, mildew and the blind that got rained on
Rain comes in sideways here, and a blind left down over an open window will get wet. What you do in the next few hours decides whether it recovers.
Leave it lowered and fully extended. Do not roll it, do not fold it, do not stack a Roman. Open the window once the rain stops, get air moving across both faces with a fan if you have one, and leave it until it is dry to the touch on both sides. A fabric blind rolled or folded while damp will spot, and in a Kolkata August it can spot within a day.
Through the monsoon generally, the enemy is still air rather than water itself. A room that stays shut for a week with the blinds down will grow mildew on the fabric nearest the window before it grows it anywhere else. Opening up for even an hour a day, and running the blinds up so air reaches the fabric on both sides, prevents most of it. The same principle applies to curtains, which we set out in our guide to cleaning curtains in Kolkata.
When cleaning is no longer the answer
Some things are worth saying plainly, because a customer who is told the truth comes back.
Fabric that has greyed evenly across the whole face has taken the soot into the fibre, and no cleaning brings that back — it reads as dirty because it is a different colour now, not because there is dirt on it. Mildew spotting that has gone through the weave is permanent. A slat that has warped will not straighten. A zebra whose bands have parted cannot be re-joined. In each of these cases, the fabric can be remade on the existing headrail and hardware in many instances, which costs considerably less than a complete new blind, and it is always worth asking before replacing the lot.
What stops all of it happening again is specifying for the window in the first place — wipeable material where there is oil, grease or an AC, fabric where there is neither. On some windows the honest answer is a curtain rather than a blind, which we weigh up in blinds vs curtains in Kolkata. That is a five-minute conversation, and it is the one we would rather have with you before the order than after the damage. Our complete window blinds buying guide, the blinds showroom page and our specialty blinds range set out what is available; our guide to what blinds cost explains how a quotation is built.
Frequently Asked Questions
How often should I clean my blinds in Kolkata?
A light dry dusting once a week on any window facing a main road, and once a fortnight on quieter or rear-facing windows. The traffic soot here carries an oily film that bonds to the surface if it is left for a month, and that film is what permanently dulls the colour. Keeping to the weekly habit means most blinds never need a deep clean at all.
Can I wash my blinds in a washing machine?
No. Not a roller, not a Roman, not a honeycomb, not a vertical vane. The stiffening that keeps blind fabric flat and square does not survive a wash cycle, and the blind will come out rippled and out of shape even if the colour is fine. Blinds are cleaned in place, not laundered.
How do I clean wooden blinds without damaging them?
Dry only. Close the slats one way, run a dry microfibre cloth along them from top to bottom, then close them the other way and repeat. For a specific mark, use a cloth with the barest trace of a wood-safe polish on that slat alone, working along the grain. A genuinely wet cloth on real timber swells the slat and the resulting warp is permanent.
My roller blind keeps slipping down on its own. Is it broken?
Usually not. A chain-operated roller holds its position with a small friction clutch, and fine dust packing into that clutch is the commonest reason a blind stops gripping. It is a cleaning job rather than a fault. Do not try to fix it with oil — lubricant in a friction clutch makes it worse and attracts more dust.
Can honeycomb blinds be washed?
No. The cells are open at the sides, so anything wet gets inside and cannot be dried out, and anything greasy stays. Vacuum the face on low suction, or blow the cells through with compressed air. This is also why a honeycomb should never be fitted over a kitchen hob — a PVC roller belongs there instead.
What should I do if my blind gets soaked in the rain?
Leave it fully lowered and extended, open the window once the rain stops, and get air moving across both faces until it is dry to the touch. Do not roll a roller or stack a Roman while it is damp — trapped moisture in a tight roll breeds mildew inside, and by the time the spots appear on the face they have gone through the weave.
Can old or stained blinds be repaired instead of replaced?
Often, yes. Where the headrail, tube and brackets are sound, the fabric alone can be remade to the same size and fitted to the existing hardware, which costs considerably less than a whole new blind. Send us photographs on WhatsApp and we will tell you honestly whether it is worth doing or whether the mechanism has had its life too.
Come and see the difference a cleanable blind makes
The easiest way to settle which material belongs on which window is to handle both. We keep every blind type in the showroom — roller, Roman, wooden, faux-wood, vertical, zebra, honeycomb and motorised — including the waterproof PVC options made for kitchens and bathrooms, so you can see exactly what wipes clean and what does not before you commit to it.
Everything we supply is made to measure, and measured and fitted by our own team rather than outsourced, which is why we are willing to be held to how it performs a few years later. Our soft interior designer and colour consultant will go through it with you at no charge.
Avikar Furniture & Furnishings
46 Central Avenue, Kolkata 700012
Phone and WhatsApp: 8080095551 | Message us on WhatsApp
Monday to Saturday, 10:30 AM to 7:00 PM. Parking available on request.
Serving Kolkata since 1971, with 6,500+ happy homes and a 4.7 rating.
Not sure which blind suits a particular window? Book a consultation and we will measure it in person and tell you what will still look right in five years.
