How to Clean Windows Without Streaks

This guide is for anyone who cleans their windows and still ends up with smears, haze and drip marks once the sun comes out. You will learn why streaks happen, what tools and cleaning mixes work best, a step-by-step squeegee technique, how to deal with frames, sills, tracks and screens, and how to clean upstairs windows safely. Working at height carries real risks: general information, not professional advice.

Why Windows Streak

Streaks are almost always something left behind on the glass. Once you know what causes them, you can stop them at the source rather than polishing endlessly.

Notice that most of these problems come from using too much of something: too much cleaner, too much water left to dry, or too much dirt moved around. The professional approach is simple: loosen the dirt, remove it quickly and completely, and leave nothing on the glass.

Tools and Cleaning Mixes

A basic kit does a better job than an expensive spray and a roll of kitchen paper. You can buy everything here at a hardware store or online for a modest amount, and it will last for years.

• Squeegee. A 25 to 35 cm blade suits most household windows. Look for one with a replaceable rubber strip.
• Scrubber or applicator. A washable sleeve on a T-bar that holds water and loosens dirt. A large sponge works as a cheaper alternative.
• Microfibre cloths. At least three: one for frames, one for wiping the squeegee blade and edges, and one waffle-weave or glass cloth for final polishing.
• Bucket. One wide enough to dip the scrubber in.
• Scraper. A plastic or blade scraper for paint flecks and stuck-on debris, used only on wet glass.
• Extension pole. For reaching high ground-floor glass and some upper windows from the ground.
• Soft brush and vacuum. For tracks and sills.

For the cleaning mix, simple is best. Use a bucket of warm water with a very small squirt of washing-up liquid, roughly a teaspoon in several litres. This gives enough slip for the squeegee without leaving a film. In hard-water areas, add a cup of white vinegar. For a spray bottle mix for small panes and mirrors, combine equal parts white vinegar and water, with a drop of washing-up liquid if the glass is greasy.