I have reoccurring stains on tiles in my bathroom. This was a new bathroom 4yrs ago but the fall is terrible so water pools outside and inside the shower area. I have tried to seal the tiles with Betta tile and grout sealer but it didn’t last. Any suggestions about some other option (other than ripping up the tiles and starting over) would be great. I usually clean this with bicarbonate or gumption but this is a temporary fix.