My husband was giving a thorough cleaning of our BP's tank tonight and when I was putting the Mopani wood back in, I noticed something white or tan on the bottom. I smelled it and it seems to be a fungus - smells like mushrooms.

Should I worry? How do I get rid of it? I am baking it at 190 degrees, is that enough? How long, etc.? Also, the wood is porous, is scrubbing it off after it's sterile enough? Any ideas?

By the way, we have been struggling with keeping our humidity high enough, so I am surprised to see this!

Thanks!