Most people hire the first window cleaner who answers the phone, then regret it when streaks show up or the guy ghosts them. I've been through this loop more times than I'd like. Here's what actually works.
Before You Search
Figure out what you actually need. Interior, exterior, or both? Screens and tracks? Second-story windows? That changes who you can hire and what you'll pay. Also, check your windows for damage — cracked seals or broken hardware. If you find issues, fix those first, or the cleaner will either refuse the job or blame you later.
Vetting Candidates
Ask for proof of insurance and workers' comp before you even talk price. A guy with a ladder and a squeegee might be fine, but if he falls off your roof, that's your problem. Call the insurance company to verify the policy is active — don't just look at a piece of paper. Then ask for three recent references and actually call them. Ask about punctuality, cleanup, and whether they showed up on the promised day.
Getting Quotes
Get at least three written quotes, but don't compare them line by line. One guy might quote per window, another per hour, another per pane. That's fine — just make sure each quote lists exactly what's included: interior, exterior, screens, tracks, sills, and any hard water spots. If a quote is vague, that's a red flag. Also, beware the guy who quotes way low. He's either cutting corners or will hit you with add-ons halfway through.
Before You Sign
Read the contract like it's a lease. Look for cancellation terms, rescheduling fees, and whether the price is locked for a year or can change. Make sure the guarantee is in writing — if they streak your glass, do they come back free? Also, confirm they'll move your furniture or plants, and if not, you'll need to clear the window sills yourself. Get everything in writing, including the exact date and time window. A handshake doesn't hold up when they don't show.
Compare local window cleaning options on RatingsNearMe — just filter by verified reviews and insurance status, and you'll skip half the headaches I had.