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How Do I Clean Blinds and Sliding Glass Doors?

How Do I Clean Blinds and Sliding Glass Doors?

Dear Sage,

"Our house has a wall of sliding doors onto the lanai and vertical blinds across all of it, plus horizontal blinds in every bedroom. I have never once cleaned the blinds properly — I dust them and they look worse. And every time I clean the glass it looks perfect while it's wet and streaky the second it dries. I've tried three different sprays. What am I doing wrong?"

– Defeated by Glass in Tavares

Dear Defeated by Glass,

You're doing one thing wrong on the glass and it's almost certainly not the spray, so you can stop buying bottles.

You're cleaning it in sunlight.

That's the whole answer for most people. Florida glass is bright, and warm glass flashes the cleaner off before you've finished wiping. The product dries in place instead of being removed, and what you're seeing when it "dries streaky" is the cleaner itself, not dirt.

Clean glass early in the morning, in the evening, or on an overcast day. Or work on whichever side of the house is shaded at that hour and come back to the other side later. Just this one change fixes most streaking.

Then there are a few technique things, and the blinds are a different problem entirely. Let's take them in turn.

Glass, Properly

Use less product

Glass cleaner needs to be fully removed. Any excess has nowhere to go and dries as a film — the same reason heavy-handed floor cleaning leaves a haze.

A light mist is plenty. If liquid is running down the pane, that's several times more than the job needs.

Two cloths, not one

This is the technique almost nobody uses and it's the difference between good and perfect.

One microfiber cloth to clean, a second completely dry microfiber to buff immediately afterwards. The first lifts the dirt, the second removes what the first left behind. Takes an extra thirty seconds a pane.

Microfiber, not paper towels

Paper towels shed lint onto glass, which is a particularly annoying way to fail after doing everything else right. Newspaper is an old trick that genuinely works but is messy and the ink is no fun.

Use two clean microfiber cloths and wash them without fabric softener — softener coats the fibers and ruins their ability to absorb, which is why a tired microfiber cloth suddenly starts smearing.

Work in one direction

Horizontal strokes on one side, vertical on the other. Then when you spot a streak you instantly know which side of the glass it's on, which saves cleaning the wrong face twice.

Edges and corners last

Grime collects in the corners and gets dragged back across the pane if you start there. Do the main area, then the perimeter, then buff.

Do the frames and sill first

Otherwise dust from the frame lands on the glass you just finished. Same top-to-bottom logic as the rest of cleaning.

Blinds: Why They Get So Bad

Blinds are the single most-postponed job in any house, and there's a reason beyond laziness.

They're a stack of horizontal surfaces hanging in moving air, they carry a static charge that actively attracts dust, and in a kitchen they collect an invisible film of cooking grease that turns ordinary dust into something sticky. Florida humidity makes that film tackier still.

So dust lands, sticks, and then a dry duster just smears it into a gray film — which is exactly what you've been experiencing. You can't dry-dust a greasy blind. That's why it looks worse afterwards.

What To Do Instead

Vacuum first, always

Brush attachment, low suction, slats closed flat. This removes the loose layer so you're not turning it into mud the moment anything damp touches it.

Skipping this step is why blind cleaning so often goes badly.

Then damp-wipe, by slat

Close the slats one way. Wipe each slat along its length with a damp microfiber cloth. Then close them the other way and do the other side.

Working slat by slat feels slow and is genuinely faster than any of the shortcuts, because the shortcuts mostly need redoing.

The sock trick is worth knowing: an old cotton sock over your hand, lightly damp, lets you pinch a slat and run along it doing both faces in one pass. Better than any gadget sold for the purpose.

For a greasy kitchen blind, a drop of dish soap in warm water cuts the film. Wipe again with plain water afterwards so no soap is left — soap residue attracts dust faster than the grease did.

Know what your blinds are made of

This matters more than people expect:

  • Faux wood and vinyl — the most common in Florida, and the most forgiving. Damp cloth, mild soap, no problem. Avoid harsh solvents, which make vinyl brittle over time, especially slats that sit in direct sun all day
  • Real wood — do not get these wet. Water stains, swells and warps timber slats permanently. Dry microfiber or a barely-there damp cloth and immediate drying, and use a wood-safe product if you use anything
  • Fabric and cellular shades — vacuum only, gently. Wet-cleaning usually leaves a watermark that's worse than what you started with. Spot-clean carefully or get them professionally done
  • Plantation shutters — common down here and easy. Wide louvers, damp cloth, just mind the hinges and the gaps where the panels meet
  • Vertical blinds — hold the vane steady at the bottom while you wipe, or you'll bend or unhook it. The top carriers are plastic and crack if you force them

Don't put them in the bath

It circulates as a hack and it's bad advice for most blinds. It warps real wood, it gets water into the headrail and mechanism, and it leaves you wrestling a dripping six-foot blind through the house. On faux wood it occasionally works. It isn't worth the risk on anything else.

The Florida Bits

Pollen film. During ragweed season, roughly August through November, a fine layer settles on the inside of window glass near any opening and on every blind slat. It's easy to miss because it's even — you notice it when you wipe one slat and see the contrast.

Sliders take the brunt. Your lanai doors get hands, dog noses, weather driven under the roof line, and far more traffic than any window. They need doing more often than the rest.

The slider track is its own small job. Sand and dead insects collect there and it's the reason a door gets stiffer every year. Vacuum it out, then wipe — we covered this in more detail in the lanai, patio and garage post.

Screens want a soft brush or a vacuum, not pressure. Screen mesh stretches and tears easily, and a stretched screen never sits right again.

Sun exposure means west-facing slats take a beating all year. Harsh cleaners accelerate that. Mild is better.

How Often

More often than you'd need to in a cooler, drier state:

  • Sliders and patio glass — monthly, realistically. They're the hardest-working glass in the house
  • Other interior glass and mirrors — with your regular clean
  • Blinds, quick vacuum — monthly, and it takes minutes
  • Blinds, proper wipe — two to four times a year; kitchen blinds at the frequent end because of the grease
  • Exterior glass — twice a year for most houses

What's Included and What Isn't

To be clear about it, since this is a common assumption:

Interior glass — mirrors, sliders and windows reachable from inside — is commonly included or easily added to a clean.

Blinds get dusted as part of routine work. A proper slat-by-slat wash of every blind in the house is a different scale of job and needs to be asked for so the time is there.

Exterior windows are a separate quoted service. Outside glass here has sprinkler spotting and mineral marks, and upper-story panes need equipment a house cleaner doesn't carry.

None of these are refusals. They just need to be in the booking rather than discovered on arrival.

Sage's Final Thoughts

Stop cleaning glass in direct sun. That alone will fix most of what's been frustrating you, and it costs nothing but timing.

Then: less product, two cloths with the second one dry, microfiber rather than paper, and opposite directions on opposite faces so you can find your streaks.

For blinds, vacuum before anything damp touches them, work slat by slat, and know whether yours are wood before you introduce water to them.

And give the sliders their own slot in your routine. They're the dirtiest glass in a Florida house by a wide margin, and they're also the glass everybody looks through.

If the blinds have got beyond a wipe, say so when you book — it's a real job and we'd rather schedule it than find it. Book online in about two minutes, or call or text (352) 717-8403.