If your cleaning those houses trad in the rain,the info your giving them is not correct.Sticky soap residue on the windows when cleaning trad will not keep them cleaner for longer,this only applies when cleaning WFP in the rain.Try for yourself i have,clean 1 window trad and clean 1 window WFP,go back after a week and have a look even when you do the frames trad that window that has had detergent put on it will be the worst,that also includes when you use GG3.