When I was a nipper , and I spilled some mucky fat or pigeon blood on the kitchen floor . My dear old grandma would say . “ you won’t get it off with cold water , put a pan on, t stove and boil some water . Same applies to windows . I wouldn’t send my lads out in all weathers toclean a window or two with cold water . Since we went hot they are easily earning me an extra bag of sand a week . And that’s what counts . Just off for a game of darts with my mate Bill . See who gets the bullseye .