Many household dishwashers harbour a toxic fungus, say scientists in Slovenia. They found black yeast on the rubber door seals of 35% of the dishwashers they tested. Worst case? Contaminated dishes and cutlery could sicken you. To clean a funky seal, blot it with a rag soaked in diluted bleach. Wait a few minutes, scrub the seal, and then wipe with a clean wet rag.
All images from Stockexchange.