I have to quote for post construction work. Its massive 260 large windows (that includes inside) I did work for them before and got paid no problem, and there is another two Jobs , bigger than this one, within the next year. So I want this. Here is the problem. They did not tape the frames, they used that plastic sheet, that covers the frames and the glass. Of course, the plastic sheet is badly ripped in half the windows and as a result, there is cement in the groves. (please see photo) Now assuming hot water does not soften the cement, what is the best (if there is one) solution to get the cement out? Something that would work quickly, as typical builders they want me in and out of the Job asap. Any help would be great thanks. would WD40 do it?