Streak-Free Window Cleaning Techniques

Achieving perfectly clear, streak-free windows isn’t just chance—it’s about using the right methods, tools, and attention to detail. Even small mistakes can leave marks that ruin the sparkle.

Choose the Right Tools

Use a high-quality squeegee, lint-free microfiber cloths, and a bucket with clean water. Avoid abrasive sponges or cloths that can scratch glass.

Use Clean, Filtered Water

Tap water often leaves mineral spots. Professional window cleaners often use purified or deionized water, which prevents streaks and leaves glass crystal clear.

Apply the Correct Technique

Start at the top of the window and work downward. Use overlapping horizontal or vertical strokes and wipe the squeegee blade after each pass. Avoid over-wetting the glass, which can lead to drips.

Dry Edges and Sills Carefully

Even if the glass is clean, leftover water on edges and sills can leave streaks. Wipe with a dry microfiber cloth after squeegeeing, and don’t forget corners.

Clean in the Right Conditions

Avoid cleaning windows in direct sunlight or very hot weather. Water evaporates too quickly and leaves streaks. Overcast days or mornings are ideal.

Professional Tricks

Window cleaners often use small hand mops for detail areas, squeegee angles that minimize water runoff, and even mild additives in water to enhance cleaning. These little tricks make a big difference.