i quit having problems with cuttings once i got rid of the mist and dome, unless you're in a desert its not usually necessary, and especially not if youre using a bubble bucket, that cut will stay plenty hydrated. The cut will take up water thru the stem much better than through the leaves. If all that werent enough adding a dome also creates a stale environment where mold will flourish. Another hurdle i believe comes from calling it "cloning" which evokes thoughts of labs and complicated science, when in reality you are just sticking a branch in dirt or other medium, and besides that its not even truly cloning, a true clone would come from seed modified with the dna of the cloned plant to produce the exact copy of the original. Cutting and rooting would be a better term I think.