DIY window cleaning costs less upfront — just the price of a squeegee and cleaning solution — but it takes hours of your weekend and rarely matches a professional, streak-free finish. Professional window cleaning in Los Angeles starts at $100 and saves time, reduces safety risk on ladders, and handles screens, tracks, and hard water stains DIY tools usually can't. Cleaning your own windows seems simple enough: grab a bottle of glass cleaner, some paper towels, and get to work