I did try to remove some at one time but I couldn't get it to come off in strands. Do you know if I could use a silicon caulk remover or is this hard on the fiberglass and metal? Also, once the caulking is removed and you use bleach, can the bleach run down under the floor outside the shower or anywhere underneath to cause damage? The removal would be all around the bottom edge of the glass where it meets the metal framing? Thanks again Steve!