
So I keep all my cabs in a climate controlled storage unit all with all my other pa gear. After some rearranging I noticed my least used cabs have some mold looking stuff growing on it. The floors are finished concrete and there's never been a sign of water or moisture. It's the ones sitting on the ground that haven't really been moved much. What can I safely use to get it off and how to keep it off?

I touched that cleaned spot to the right of the brace btw
