why does the shower turn dark in between the tiles and spots on the ceiling? Where would the possible mold of that’s it be from? In the walls or somewhere further away or where possibly, what is it and what can be done for it

Question

title says it all

In: 2

Answer 1

Its mostly old organic matter, oils, skin cells, etc, that has attached itself to the grout (the stuff between tiles). It will have been colonized by bacteria but doesnt mean that they are ‘bad’ bacteria. The best way to clean it spotless is with a pressure washer. Scrubbing can work but grout is rough like sandpaper, your brush will not get the ‘dark’ stuff our because it is mashed in there.