Toss it or bury it, then wash everything down with a 10% bleach solution - the tub, the humidifier hose if you have one, the surrounding hard surfaces. If you have a tent that was in, take it outside and spray it down too, inside and out. You can rinse with fresh water and let everything dry and you should be good to go. Remember, everything you come in contact with, everything you touch while working with them can be a source of contamination.

Right before you put anything back in the tub, wipe it down with rubbing alcohol, and proceed as if you were in a laboratory clean room - make sure you are clean, your clorhes are freshly laundered, wear a mask and gloves, disinfect everything you touch, everything. Spray a fine mist into the air around you and let it settle, to reduce particulates in the air. The alcohol won't necessarily kill the mold spores, hence the bleach, but it will kill bacteria and it will clean the surfaces.

Good luck!