Hi, just curious how do you prevent the "imprint" from teh heat plate into the poylester fabric on a shirt? I sublimated a small shirt for my nephew and the heat press was cleary imprinted in the fabric, i mean there was a line/wrinkle from the edge of the heat plate in the shirt. I got that away when i carefully ironed the shirt afterwards but then it kind of changed the surface of the polyester fabric, it got a little bit more glossy on the areas i used the hot iron but the imprints are gone. Is there a trick to prevent those heat press marks? I am not sure but i think i remember some videos about that problem and they used thin silicon sheets but maybe that was related to another problem.