What is it? Seems to grow out of some wooden areas in the room. I've tried peroxide and bleach. Would a steamer help? Sorry in advance for the bad picture quality.
Borax kills mold and also soaks into wood and stays there to prevent future growth. Bleach does not help on porous surfaces like wood:
"Note that bleach should not be used to kill mold found on wood. While bleach is very effective for killing mold on non-porous surfaces, it doesn’t work well when it comes to wood. This is because the chlorine in bleach can’t penetrate wood, so only the water portion of the bleach gets absorbed.
The mold may appear to be removed from the surface, but it’ll likely continue to grow underneath and return within a few months."
Now I'm interested in trying this on my shower grout. I wonder if it would work the same way. I'll have to check and make sure it's safe on stone and grout.