The other day I was washing a home for an individual and when I do a house I normally go around the house with a brush and bucket full of soap and hit all the windows before I begin powerwashing. Yesterday the homeowner calls and says there is a film on the windows and wants me to remedy the problem I am hoping that some glass cleaner and papertowels will remove the film. What is everyone using to wash windows I normally cover the bottom of a 5 gallon bucket with dishwashing soap, few squirts of liquid car wax and fill with water then brush. Any suggestions would be great.