Just recently when picking up NEW customers homes that are really dirty...
I find myself wetting the windows wfp, then attacking them with diluted fairy and hand brush (downstairs)
then rinsing.
While Upstairs I wet them then dip wfp in diluted fairy then rinsing
I have not had any problems, and no complaints... No residue or gray streaks that some people say can take two -three cleans to get rid of!
Anyone else do this?