Josh;
The main reasons for dough to stick to screens are 1) Use of silver, unseasoned screens. 2) You are washing your screens and not reoiling them when you begin reusing them. 3) Your dough is either very soft or you are allowing the dough to remain on the screen for an excessive period of time (like when pre forming dough skins in preparation for busy periods and letting the dough remain on the screen(s). What happens here is that the dough flows through the screen openings and as the dough bakes, it expands on the bottom side of the screen, effectively locking the crust to the screen.
Tom Lehmann/The Dough Doctor