Window washing sits at the bottom of everyone’s chore list for a reason: you work hard, the sun comes out, and every streak you made appears at once. The frustrating part is that streaks aren’t a talent problem. They’re a tools problem.
If you want to learn how to clean windows the way pros do, the method needs three items: the right solution (cheaper than you think), a squeegee, and a cloudy day. Spray bottles, paper towels, and newspaper are how the streaks got there in the first place, and they’re among the most common cleaning mistakes around.
What you need
- A squeegee with a fresh rubber blade (a worn blade is the number one cause of streaks)
- A strip applicator or a large sponge
- A bucket of warm water with a teaspoon of dish soap
- Lint-free cloths or microfiber towels (skip paper towels, they shed)
- A dry chamois or extra microfiber for edges
- A vacuum with a brush attachment for sills and tracks
The streak-free solution costs about a nickel
Warm water plus a teaspoon of dish soap. That’s the whole recipe. Pros use less soap than you’d expect, because suds leave residue and residue makes streaks. The soap’s job is to loosen grime and lubricate the squeegee, not to foam.
For glass with mineral spots or a hazy film, swap in a 50/50 mix of white vinegar and water. Vinegar dissolves hard water deposits that soap glides right over. Whatever you use, skip ammonia-based sprays near tinted or coated glass, and never mix vinegar with bleach.
How to clean windows step by step
1. Pick a cloudy day
Direct sun dries the solution before you can squeegee it, and dried soap is just streaks with extra steps.
2. Dust first
Vacuum or brush the frame, sill, and tracks so you’re not turning dust into mud on the glass.
3. Wash the glass
Dip the strip applicator or sponge, wring it lightly, and work top to bottom. Don’t skimp on the corners.
4. Squeegee in an inverted S
Start at the top left corner (top right if you’re left-handed) and pull the squeegee across in one continuous snake down the pane. Wipe the blade with a lint-free cloth after every stroke. A wet blade redeposits dirty water, which is where most streaks come from.
5. Dry the edges
Get a wet chamois and wring it dry until it’s just a little damp. This way it will soak up the drips without leaving any streaks. Use it to wipe away the moisture remaining on the corners.
6. Dry the sill
A quick pass with a rag, so drips don’t leave water spots below the glass.
Tough spots and hard water stains
For paint flecks, sticker residue, and baked-on grime, wet the glass and rub gently with #0000 steel wool, the super-fine four-zero grade, nothing coarser. It’s soft enough for glass when used wet and flat, and it erases spots a cloth never will. Test a corner first and skip it on tinted or coated windows.
For cloudy mineral rings from sprinklers or rain, soak a cloth in white vinegar, hold it against the spot for a few minutes, then scrub and rinse. If your whole pane stays hazy no matter what, the problem may be inside the glass unit, and no amount of scrubbing reaches it.
Don’t forget the screens and tracks
Clean glass behind a dirty screen is a magic trick nobody appreciates. Pop the screens out, rinse them with a hose or in the shower, scrub lightly with soapy water, and let them dry fully before they go back. Vacuum the tracks, then run a vinegar-damp cloth wrapped around a butter knife through the channels. Two minutes per window, and it’s the difference between clean and actually clean.
Rather admire the view than earn it?
Windows are a twice-a-year job that eats a whole Saturday. If that Saturday has better plans, MaidThis connects you with screened, vetted cleaners in more than 40 US cities, from Los Angeles to Milwaukee to Myrtle Beach.
Book a one-time deep clean, add interior windows as a special request, and enjoy the view someone else earned. And if the carpet and the clutter are next on the list, we’ve covered those too. Find your city.
