How to Clean Windows Like a Professional
Sparkling windows make your entire home look cared for and well-maintained. The difference between amateur and professional results comes down to technique. Here's how to get streak-free shine every time.
Quick Summary
Time needed
1-2 hours
Cost
$15-$40
Difficulty
Easy
Why Clean Windows Transform Curb Appeal
Dirty windows are more noticeable than you think. Water spots, pollen film, and grime buildup make your entire home look neglected, even if everything else is perfect. Clean windows catch light beautifully and make rooms look brighter from inside too.
Pro Tip: The best time to clean windows is on a cloudy day or when windows are in shade. Direct sunlight causes cleaning solution to evaporate too quickly, leaving streaks.
The Professional Squeegee Technique
Professionals use squeegees, not paper towels or newspapers. The technique is simple but specific:
1. Make Simple Cleaning Solution
Mix 2-3 drops of dish soap per gallon of water. That's it. More soap = more streaks.
What to avoid: Ammonia cleaners (damage tints), commercial window sprays (overpriced and leave residue), vinegar alone (doesn't cut grease well).
2. Scrub the Entire Surface
Use a microfiber scrubber or sponge dipped in solution. Scrub entire window including edges and corners. This loosens all dirt before squeegeeing.
3. Squeegee in Reverse-S Pattern
This is the professional secret:
- •Start at top left corner
- •Pull squeegee down and across in overlapping S-pattern
- •Overlap each stroke slightly (about 2 inches)
- •Wipe squeegee blade with clean cloth after EVERY pass
4. Detail the Edges
Use a lint-free microfiber cloth to wipe edges, corners, and window sills where the squeegee couldn't reach.
Essential Tools for Professional Results
Must-Have Tools
- • 12-18" squeegee with replaceable blade
- • Microfiber scrubber or T-bar washer
- • 5-gallon bucket
- • Lint-free microfiber cloths
- • Extension pole for second story
What NOT to Use
- • Paper towels (leave lint)
- • Newspaper (leaves ink residue)
- • Too much soap (causes streaks)
- • Dry cloth alone (just smears dirt)
Don't Forget the Screens
Dirty screens block light and make clean windows look dirty. Remove screens, spray with hose, scrub with soft brush and soapy water, rinse thoroughly, and let dry completely before reinstalling.
Timing Tip: Clean screens first, let them dry while you clean windows, then reinstall. This prevents dripping on freshly cleaned glass.
Frequently Asked Questions
What's the best window cleaning solution?
Professional window cleaners use simple dish soap and water (2-3 drops per gallon). Avoid ammonia-based cleaners on tinted windows. White vinegar (1:1 with water) works for light cleaning but doesn't cut heavy grime as well as dish soap. Skip commercial window cleaners - they're overpriced and leave residue.
How do I prevent streaks?
Streaks come from three sources: dirty squeegee blade, cleaning in direct sun, or using too much cleaner. The solution: use minimal soap, work in shade or on cloudy days, wipe your squeegee blade with a clean cloth after every pass, and use the overlapping S-pattern technique rather than horizontal strokes.
Should I clean windows inside and outside?
Yes, for full effect. Exterior windows get most of the visible dirt, but interior surfaces collect dust and fingerprints. Clean both sides within a week of each other. You'll immediately notice how much brighter rooms feel with truly clean windows.
Ready for the Next Step?
With sparkling windows, continue your exterior refresh by touching up any peeling or chipped paint.