When some pine sap proved resistant to regular cleaning with Windex, then with just a wet paper towel, my partner--who actually owns our MX--suggested I stop right there and ask for advice...but no, I wanted to resolve this one problem myself. Now I have two problems: the pine sap is still there but so also are lots of little scratch marks on the glass all around it where I attacked it with the rough (but non-medal) side of a kitchen sponge. So now, can anyone please tell me what kind of solvent will remove the organic pine crap and then, is there any way to buff out the (actually, pretty light) scratches I've added?