I did it successfully 1 time. It tools. Few trys to get it work the way I wanted and now every time I go to do it again it never works. I head the plastic at about 250 degrees in the little oven I use just for this. Takes a few minutes and it says and I pull it out about when it's sagging about 3 or so inches because my mold is pretty tall. And I put it over the mold and it works a little bit but just cant seem to get it to work successfully now. Anyone have tips? Like if I hear plastic at a lower teno for longer or something I'm missing here