Spray Fixative for Matte Prints?
Will this stuff keep your print from sticking to the glass? I don't know but it's a very popular preservative spray for digital prints so, in case you wind up wanting to try it, be warned: It Stinks! BAD! For a very long time!
I used it outside then left the print outside until it was getting dark (several hours) because I didn't want to bring it in the house with it smelling so bad. I brought it into a room that we don't use much and it was still stinking days later. It did eventually stop, of course, but I would never use it again on something that has to come indoors; it smells like it would give you cancer just from being in the room with it!