Why windows streak in the first place
Streaks usually come from three things: the glass drying too fast in direct sun, dirty tools that smear grime around, and mineral heavy tap water that leaves deposits as it dries.
In Los Angeles, hard water from sprinklers is one of the biggest culprits, since it dries fast in the sun and leaves visible spotting.
Steps for streak free glass at home
If you are cleaning windows yourself, these steps give the best result.
- Clean on a cool, overcast day or in the shade so the glass dries slowly
- Dust and wipe the frame first so dirt does not run onto clean glass
- Use a clean microfiber cloth or a quality squeegee, not paper towels
- Wipe the squeegee blade after each pass
- Dry the edges with a separate dry microfiber cloth
- Avoid over spraying so cleaner does not pool and dry in streaks
Common mistakes to avoid
Even careful cleaning goes wrong with the wrong approach.
- Cleaning in direct sunlight, which dries the glass before you finish
- Using paper towels or newspaper that leave lint and residue
- Reusing a dirty cloth that spreads grime
- Using too much cleaner so it dries before you can wipe it
- Rinsing with hard tap water that spots as it dries
Why professionals get a better result
For consistently spot free glass, we clean with purified deionized water. With the minerals removed, the water dries clear on its own with no film or streaks, even on large panes and upper windows.
It is the most reliable way to get a streak free finish that lasts, which is why our crews use it on every job across Los Angeles and the San Gabriel Valley.
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