lp grunge

I have left several lp's on my tt for a day or two. I have an audioquest silicone platter. On the side where the lp's sat, I now am left with a serious coating, almost as though there is a chemical reaction between the vinyl and silicone. Although I've never seen a post about this, as common as it has been for me, there must be others out there who have seen this happen. Amy way to fix this? Am I stuck with useless lp's?