Do you use Armor-All or other similar dash/vinyl cleaner? This stuff has a tendency to evaporate off the dash, then accumulate on the windshield. I get it on both my DeLorean and Eagle Talon (even though I dont use Armor-All, just too much leftover from previous cleanings). Try cleaning your entire interior (inclucing the glass) with just a soft, dry (or slightly water damp) rag. Probably your best bet unless someone else has a better idea. Jim Reeve MNDMC - Minnesota DeLorean Club DMC-6960