To cause rot, you need not only humidity, but also dirty conditions.
The cleaner you get your propagation equipment, the less likely it will be that your plants get mold.
I find it helpful to spray the inside of the dome rather than the plants themselves, so there is never water sitting on the leaves, but the air is humid.
Also, keep your temps steady so there is no condensation (dewfall) on the leaves. This is why I recommend 24 hour lighting for clones.

Spray your prop dome, tray, and pots with a bleach solution or foaming bathroom cleaner/sanitizer before use, allow to sit 10 minutes, then rinse off. Only cut on a clean surface with a fresh razor. Use hormone that is not expired, and never dip directly into the original jar- pour out what you need. I like dip-n-gro because it has a fungicide in it.

Just some hints!
stinkyattic Reviewed by stinkyattic on . molding clones!!! is it possible to get a humidity dome to humid and cause the clones to mold cuz that seems to be the case so brot them in sisde and got A humidity meter and the soild reads as wet and i know its suppost to be moist at all times so bhave brot theminside to dry a little and it seems that the meter is lowering sum but not much thanx Rating: 5