How to Get Streak-Free Windows Every Time

Why windows streak

Windows are one of the easiest wins in a deep cleaning visit. Streaks almost always come from one of four things:

• Soap film that never got wiped off
• Lint from paper towels or newspaper
• Cleaner that dried in the sun before you could buff it
• Minerals from Florida's hard, limestone-fed water

Tools

• Squeegee with a rubber blade. Plastic skips and drags. This is the biggest upgrade you can make.
• Flat, lint-free microfiber for edges and detail work.
• A second dry microfiber for the frame and sill, so grime from the track never goes back on the glass.

Skip paper towels and newspaper. They shed lint and are the most common reason DIY glass looks cloudy in bright sun.

Solution

• A few drops of dish soap in a bucket of warm water, or
• One part white vinegar to ten parts water for hard-water spots, common around Lakeland and Winter Haven, where well and city water both tend to run mineral-heavy.

Skip heavy commercial glass sprays. Their polymers and fragrance oils leave the haze people mistake for clean. On tinted glass, use an ammonia-free solution so the film doesn't cloud or lift.

Technique

1. Dust the frame and track first so you don't drag grit across the glass.
2. Wash top to bottom with a sponge or microfiber.
3. Squeegee in a reverse-S, overlapping each pass. Wipe the blade dry between every stroke. That's the trick.
4. Buff the edges with dry microfiber before drips run down and dry as a line.
5. Hose the screens separately and let them air-dry before rehanging.

Change the bucket water once it turns cloudy. And check both sides: a streak that looks like it's outside is often on the inside pane.

Timing

Never in direct midday sun, which dries the solution before you can squeegee. Early morning or an overcast afternoon is best. On muggy mornings, give the glass an extra minute before the final buff, and check the radar: a summer afternoon storm brings wind-blown grit and rain spots within the hour.

Pollen season (roughly February through April in Central Florida) re-streaks clean glass within days unless you rinse the screens and sills too. The rest of the spring list is in our spring deep cleaning checklist.

How often

• Inside glass: twice a year
• Outside glass: once a quarter, more often near construction, a busy road or a lawn mowed weekly
• Storefronts: weekly or biweekly. It's a standing line item on most of our commercial cleaning contracts.

When to call a pro

Inside windows and ground-floor exteriors are easy DIY. Second-story exteriors, large storefronts and screen enclosures need ladders, water-fed poles and a trained crew. Professional window cleaning is usually bundled into a standard visit rather than priced as a stand-alone add-on; see typical ranges on our house cleaning prices page.