We installed tile on the walls and floors of a bathroom remodel. It looks fabulous! However, since we were in a rush to complete it in time for a family event, we never sealed the grout. Now we have some spots that are stained and we have yet to seal the grout. I want to remove the stains prior to sealing. My first thought would be to use bleach, but I do not know if that will affect the sealing. Regular water and mild soap did not do the job. Is bleach okay or is there some other way to remove the stains? Thanks for the replies....it is greatly appreciated.