[Bobo Jenkins]

Does anybody know what this dark brownish substance is and how to get rid of it? This is a shower stall by the way.

 

[bob22]

Yes, it is mold with dirt. Bleach, cleaners, scrub brush, elbow grease, etc....

 

[rusty baker]

Yes, it is mold with dirt. Bleach, cleaners, scrub brush, elbow grease, etc....

And a mask.