If you've ever cleaned your windows and ended up with more streaks than you started with, the problem probably wasn't the effort — it was the tools. Screwing up newspaper, using a spray bottle of supermarket window cleaner, and wiping with a paper towel produces a mediocre result every time. Here's what actually works.
The Five Tools Professionals Use
1. Dish Soap
Not window spray, not vinegar — plain dish soap. A small amount mixed into a bucket of warm water is the standard professional cleaning solution. Dish soap is a degreaser, which means it breaks down the film of grime, oils, and pollution that builds up on glass. It also makes the water slippery, which helps the squeegee glide across the surface without dragging.
The key is to use less than you think you need. Excessive suds create foam that the squeegee pushes around rather than removing, and too much detergent leaves a residue that attracts more grime. A teaspoon of dish soap to a standard bucket is enough.
2. A Bucket
The bucket serves as the base for your cleaning solution and the holder for your squeegee between strokes. Use one that's wide enough to fit the full width of your squeegee channel — this makes it easy to reload the mop and keep the squeegee wet.
3. The Applicator Mop
A window mop (also called an applicator or scrubber) has a microfiber or lambswool sleeve on a handle. You dip it in the soapy solution and run it across the glass to wet the surface and loosen dirt. It covers the glass faster and more evenly than a sponge, and the texture of the sleeve lifts grime that a smooth sponge would just move around.
Work one pane at a time — apply the solution to one window before moving to the squeegee. If you wet too many panes at once, the first ones will start to dry before you squeegee them, which causes streaking.
4. The Squeegee
This is the most important tool in the kit. A squeegee is a T-shaped rubber blade in a metal or plastic channel, pulled across the glass to remove water and dissolved dirt in a single smooth stroke.
The quality of the rubber blade matters significantly. A fresh, clean rubber blade leaves glass genuinely clear. A worn, nicked, or dirty blade leaves lines. Blades should be replaced regularly — once a year if you clean your windows once or twice a year at home, more often for frequent cleaning.
Technique matters too. Start at the top of the pane and work in overlapping horizontal strokes, maintaining consistent pressure throughout the stroke. Wipe the blade with a microfiber cloth between strokes so you're not redistributing dirty water across the cleaned section.
5. Microfiber Cloths
Microfiber cloths have two roles: wiping the squeegee blade clean between strokes, and catching the thin bead of water left around the edges of the pane after squeegeeing. Cotton cloths and paper towels leave lint on the glass. Microfiber doesn't.
Keep a few cloths on hand. Once one becomes saturated it stops absorbing effectively, so swapping to a dry cloth mid-job makes a noticeable difference to the final result.
What to Avoid
Newspaper — Once recommended as a window cleaning tool. Modern newspapers use different ink that smears rather than polishes.
Paper towels — Lint and fibres end up on the glass.
Spray bottle cleaners alone — Without a squeegee, you're just redistributing moisture.
Abrasive pads or steel wool (other than ultra-fine 0000 grade for specific stain removal) — These scratch glass. Even light scratching catches the light and makes windows look dull.
The Complete Process
Dip the mop in the soapy solution, wring it slightly so it's wet but not dripping, and apply it to the glass. Then work the squeegee from the top in horizontal overlapping strokes, wiping the blade between each pass. Finish with a microfiber cloth around the frame edges to catch any remaining drips.
For more detail on technique, see our full guide on how to clean windows. If you'd prefer to hand this over to someone who does it every day, our residential window cleaning team uses professional-grade versions of everything described above.
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