I need to purchase and install a 34" x 43" mirror with a 1" or 1 1/4" beveled edge in our master bath. I have seen bathroom mirrors where there is darkness appearing in some places along the edge. Is there a special type of mirror to use in the bathroom where it gets humid? What would be the best width for the beveled edge? Also, what is the best way to attach it, glue, clips or an L channel at the bottom and glue?