How to Professionally Clean Windows With a Squeegee Cleaning your windows should be a twice a year exercise in every home. And everyone should do it properly. This guide was made by consulting professionals from Fantastic Window Cleaning Putney and will leave your windows pretty clean afterwards. There are only a few tools you need for that. Real professionals do it with a squeegee and so should you. They are not a vast investment (~10 pounds for a regular one, 20 for a quality one) and really make the difference. A strip applicator is necessary too. List item number three should be a bucket full with the cleaning solution. There are many high-rated products on the market, but real professionals use only a squirt of dishwashing liquid mixed with warm water. The last thing you'll need is a chamois leather for drying the window glass. Also throw in some rags. You can do the whole operation in three simple steps First thing's first. Here is our window. Step 1: Apply the cleaning mixture. Use the strip applicator for that purpose.