Years ago I tried white strips - after 1 strip the bottom 1/3 of my front teeth became so see-thru they looked grey. I let my teeth stain so this would be less noticeable - now my teeth are yellow. I do have chronic GERD/acid on my enamel. I want to whiten again. I've read it doesn't damage enamel yet also read that increased teeth translucency can possibly be from a poor bite or over-bleaching. After bleaching, is this inc translucency usually temporary? Or does it, in fact, thin your enamel?