10 Window Cleaning Tips from a Pro

Save time, money and energy with these tips and pointers from someone who cleans windows for a living. Here's how to get streak-free windows every time.

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Two scrubbers are better than one
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Two scrubbers are better than one

Use two different scrubbers—one for inside and one for outside—so you don't carry pollutants and bird excrement inside.

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Liquid dish detergent rules
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Liquid dish detergent rules

Any kitchen dish liquid cleans dirt and grease and leaves the glass slippery so your squeegee glides well. A 100-percent biodegradable soap will protect sensitive plants outside. Inside it will protect toddlers and pets who put their mouth on the windows or sills.

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Vinegar works, too

Vinegar works, too

If you prefer to use natural cleaning products, vinegar is a viable choice for cleaning windows. Vinegar (acetic acid) cuts grease and doesn't streak which makes it ideal for cleaning glass. We recommend a solution of 50 percent white vinegar and 50 percent tap water.
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Oh, oh, oh it's magic
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Oh, oh, oh it's magic

Mr. Clean Magic Eraser removes silicone caulk and water stains.

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Dual-purpose paint can opener
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Dual-purpose paint can opener

A paint can opener is the perfect tool for popping out window screens.
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New blade = no streaks
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New blade = no streaks

A 12- to 14-in. squeegee is a good size for most situations. Put in a new rubber blade after each cleaning to prevent streaks.

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New blade = no scratches
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New blade = no scratches

A razor blade removes paint overspray and gunk. Keep the glass wet and use a new blade each time. Microscopic rust particles on the blade can scratch the glass.

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Details matter
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Details matter

Carry two detailing rags—one for dirty jobs like sills and the other for detailing the edges of the glass.

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Steel wool for tough stains

Steel wool for tough stains

If you need to remove tree sap, adhesive residue or other tenacious stains from your windows, try #0000 (4 ought) steel wool. Lubricate the glass with a spritz of window cleaner (Windex) and buff away the stains with a wad of super-fine steel wool.
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Bring out the power tools
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Bring out the power tools

Scrub away the toughest stains on glass with a small buffing wheel and a mild abrasive (Soft Scrub, Bar Keepers Friend or Bon Ami). When you're working near the window sash, protect it with masking tape.