How do you know if mold is behind drywall?

Online Answer
Mold can be black, green, gray, white, or brown. Mold can even appear orange, pink or purple when it grows behind vinyl wallpaper. Another sign of visible mold is discoloration of walls, even if it has been painted over. If the water damage inside the walls persists, mold will show signs on the surface.
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Left unchecked, you will see mold turn into mushrooms in your home. Once a leak, flood, or dampness occurs, mold begins to spread, and its natural progression is to spur mushrooms. Just like the fungus they emerge from, these mold mushrooms are toxic and harmful to humans and animals alike.
Black spots can occur during growth or due to mold. It is best to remove the outside leaves and discard them, then wash the remaining cabbage before use. If the spots are on the inside leaves as well, return the cabbage to the store for a refund..
No, it is due to the toxin produced by the fungi, which are in the same family as molds. Mushroom poisoning is caused by the consumption of raw or cooked mushrooms, which are higher-species of fungi.
Most of the mold and rice should dump right out. Rinse the inner pot with boiling water. That should kill whatever mold that is still there.