
Clean From Top to Bottom
If you really want your window or mirror to be streak free, clean from the top to the bottom. Because the cleaning solution can drip, you want to use gravity to your advantage and let the cleaner drip into areas you haven't washed yet. Begin at the top and work your way down to make sure that no drips will happen on the glass surfaces that are already perfectly cleaned.
Wash Windows on a Cloudy Day
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