I read that to get the print to stick to the glass I needed a bed heater. I bought one from Amazon for my xvico. I got it and my question is. Does it replace the glass, or does it meant to work in concert with the glass. One side of this thing is printed the other side is aluminum, and the same size as the glass. I don't seem to be able to get a print to stick to the glass. I've tried the glue stick, didn't make much difference. I need help.