Glass has lots of fine dust that a shop towel and acetone remove well- wire brush on lams freshly ground- let them sit too long oxidation takes it course:)
I agree with Stagmitis , Although i do not use a wire brush. i agree with freshly sanded surfaces on wood to be the best, and never use any type of solvents on wood. i use acetone on glass, carbon, and phenolic.
On a side note.... When grinding tapers, par's, and other lams, to include veneers, to be used at a later date, stacking them tightly with a cover lam will help with oxidization. If the lams start turning a shade darker, it's always a good idea to touch sand them before using them. Kirk