Mold always makes my sphincter turn into a starfish that is locked up so tight that turns into a black hole or brown. Have only dealt with it a few times in my life but it just pisses off the good humor man. We treat them well and provide a safe environment for them and we ensure that we buy the right tools and still a few fall through the cracks and ruin our day. If you find one then it's always the best plan to quarantine the rest and watch over them like a jealous boyfriend.