How to Get Streak-Free Windows (A Pro's Step-by-Step Guide)

Streaky windows are almost never about how hard you scrub — they're about technique, tools, and timing. Here's the method professionals use to get glass that genuinely disappears.

What you'll need

• A squeegee with a sharp, undamaged rubber blade.
• A microfibre cloth or scrubber/applicator (not paper towel).
• A bucket of warm water with a few drops of dish soap, or a dedicated glass cleaner.
• A lint-free cloth for edges and detailing.

The step-by-step method

1. Dust or brush off loose dirt and cobwebs first so you're not grinding grit into the glass.
2. Wet the entire pane with your soapy solution using the scrubber — don't be shy, you want the whole surface covered.
3. Loosen any stuck-on spots by scrubbing them while the glass is wet.
4. Pull the squeegee from top to bottom (or side to side) in slightly overlapping strokes, wiping the blade with a clean cloth after each pass.
5. Run a dry microfibre cloth around the edges to catch any remaining drips.
6. Buff out any stubborn spots with a clean, dry lint-free cloth.

The mistakes that cause streaks

• Cleaning in direct sunlight — the solution dries before you can squeegee it, leaving streaks. Work in shade or on a cloudy day.
• Using paper towel or newspaper, which leave lint and fibres behind.
• Too much soap, which dries into a film. A few drops is plenty.
• A nicked or worn squeegee blade that leaves a line on every pass.
• Reusing a dirty cloth that just redistributes grime.

Why hire a pro?

DIY works fine for a few accessible windows. But for storefronts, upper-storey glass, hard-water staining, or large facades, professionals have the reach poles, purified-water systems, and experience to deliver a flawless finish safely — without ladders and risk on your end.

Aby's Cleaning Crew handles residential and commercial window cleaning across Sudbury, Ontario, with a streak-free guarantee. Reach out for a free quote.