i did my first house of the year with grease on the windows due cooking on the bbq.it took 4 cleans to remove the grease as it kills the soap, i always tell the customer off when this happens as they don't realise what it does.how does wfp deal with this ?
Never used it myself , but when i started , i was told WD40 is good for that sort of stuff ,obviously not with WFP though