i left my tiles removable as well but they fit so tight that i cant get them out now, what a shame LOL. next time that i cam able to get them out i will have to sand them down a little bit and see if that helps. As for cleaning i use the walmart brand of bleach disinfectant(Great Value) place in shower spray entire area let set for a few minutes then i scrub with a sponge or tooth brush depending on what im cleaning, then rinse, rinse, rinse. Dont leave them on the bottom of the tub to rinse, make sure to pick each one up and properly cleanse it.