Ask Lemmy

From a person with a lot of years of experience fighting mold on wood in a humid climate, what you want is borax:

https://www.thisoldhouse.com/green-home/21331232/killing-mold-on-wood

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."

Those are the tasty bits.

disclaimer. Do not eat the tasty bits®

If the voice get louder seek medical help

Well, it's definitely mold.

That's a chair? It shouldn't just be growing there randomly. So you live in a highly humid environment? Eesh.

White rot fungus, use very diluted bleach (like 5%, a cup of bleach in a gallon of water.) or vinegar (either might alter the wood finish though...), wrap the arm of the chair in paper towels and keep them damp with it for like 30 minutes or so to let it soak into the substrate of the mold inside the wood, and it should just come off with a brush.

Don't let it go everywhere when brushing it off because the more you spread the spores, the more mold you get.

A steamer will likely make it grow more. It'll look like it's working but it'll grow back worse.

When you say "wooden areas of the room," do you mean it's on different wooden objects? That's a chair in the picture, right? What else is it on?

Is the room humid? If it's any kind of mold, streaming is a bad idea.

Yep, it's growth.

A quick google search seems to indicate that being mold/mildew. You should really check the humidity in your room/building and correct that, offhand it seems to be high if you repeatedly see mold growing there.