Thread by @dvdty

when you find mold, leaving it alone means it will fester, grow, and be toxic to the inhabitants.

what do you do with mold? you clean it up, spray some anti-fungal, and expose the corner it grew out of to sunlight and air.

ventilation and UV exposure is the key, that's why windowless toilets are always a bad idea, never mind what the developer/seller is telling you. mechanical interventions limit its ventilation to the times you switch it on, and it is never on as long as it actually needs it to be

where does mold grow? it grows in cool, damp, places not exposed to sunlight, like under a bridge, or in a cave.

basically, where trolls traditionally live.

so if you have a corner of your house that's cool and damp, find a way to ventilate it and expose it to natural light. if mold is inside your walls, that means that there is some moisture stuck somewhere that can't get out.