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.
10 Window Cleaning Tips from a Pro
![Two scrubbers are better than one](https://www.familyhandyman.com/wp-content/uploads/2017/05/FH13FEB_535_05_008.jpg)
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.
![Liquid dish detergent rules](https://www.familyhandyman.com/wp-content/uploads/2017/05/FH13FEB_535_05_001.jpg)
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.
![Vinegar works, too](https://www.familyhandyman.com/wp-content/uploads/2017/05/2017MAR_WinClnTips_02.jpg)
Vinegar works, too
![Dual-purpose paint can opener](https://www.familyhandyman.com/wp-content/uploads/2017/05/FH13FEB_535_05_004.jpg)
Dual-purpose paint can opener
![New blade = no streaks](https://www.familyhandyman.com/wp-content/uploads/2017/05/FH13FEB_535_05_007.jpg)
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.
![New blade = no scratches](https://www.familyhandyman.com/wp-content/uploads/2017/05/FH13FEB_535_05_006.jpg)
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.
![Details matter](https://www.familyhandyman.com/wp-content/uploads/2017/05/FH13FEB_535_05_010.jpg)
Details matter
Carry two detailing rags—one for dirty jobs like sills and the other for detailing the edges of the glass.
![Steel wool for tough stains](https://www.familyhandyman.com/wp-content/uploads/2017/05/2017MAR_WinClnTips_01.jpg)
Steel wool for tough stains
![Bring out the power tools](https://www.familyhandyman.com/wp-content/uploads/2017/05/FH05MAR_456_06_016.jpg)