Actually, there are tools for removing staples. The simplest is just a piece of steel with a bent up end, about 1/2" long filed to a rounded point. Works better than a screw driver, but often only one side of the staple comes out and you still have to yank the other side out with pliers. I'd pull down all the tiles then go back over with the remover in one hand and a pair of pliers in the other; should go pretty quickly. BTW, where eye protection, sometimes they come out like a shot.