I have an old bathroom mirror that was framed by adhering the frame directly to the glass. Hence, when you see it from behind, all you see is the mirror, no frame edge. Here's the dilemma: I can't add hangers because there is no wood for them to screw into. I can't use plastic clips because the frame makes the mirror too thick. Does anyone have a good idea for how I can attach it to a wall without using adhesive? The mirror is ridiculously heavy--not sure how much, but I'm guessing close to 50 lbs. Up until now it's just been on a mantle, leaning, but in the remodel, the mantle has gone away.