When your doing maintainance cleans on windows with top openers do you still go with one visit to the glass on the whole window or do you do the top opener then do another window and return to the original window to clean the glass under top opener. I'm trying to speed things up and returning to each window while lugging the backpack around is causing me to spend to long on each house, one visit would make a difference but at the moment i'm still a little cautious about drips from above etc. any advice much appreciated.