Streak-free windows seem mysterious to most homeowners. The truth: it's mostly technique + tools, not products. Here's the professional approach.
Tool #1: The right squeegee
Professionals use a brass-channel squeegee with a quality rubber blade. Replaceable rubber every 8-10 jobs. The squeegee creates the streak-free finish — wiping with cloth alone won't get there on big windows.
Tool #2: Microfiber for edges
Squeegee for the glass body. Damp microfiber for the edges, frame, and any spot you missed. Cotton terry leaves lint — avoid.
Tool #3: Pole system for tall windows
Water-fed pole systems with purified water leave NO mineral residue when they dry. This is how professionals do 3-story windows without ladders.
The right technique
Wet the entire glass with cleaning solution (1 squirt of dish soap in cold water works for residential). Pull the squeegee in a single straight motion across, wipe the blade with a microfiber between passes. Work from top to bottom, edges last.
The mistake homeowners make
Hot water + Windex + paper towel. The hot water leaves spots from mineral content (Seattle water is harder than people realize). Windex has surfactants that need to be wiped fully. Paper towel leaves lint.
If your windows streak after every cleaning, you're using the wrong tool, not the wrong product.
For homes that try every product but still streak — let us do it once with professional tools. The difference is genuinely astonishing.
Need residential window cleaning in Seattle?
We're Crystal Clear Window Co. — family-owned, fully licensed, and answering the phone live. Most Seattle jobs booked same-day.