I’ve been having a bit of problems getting my resin coaster molds out of the molds so I tried the Castin Craft mold release spray. I followed instructions by Spraying it in the mold, working it into the mold and letting it dry completely before pouring my resin in. Although my resin came out easily you can see all of the dried mold release spray on my clear coaster. Any suggestions not how not to get those marks?