A lot of people are replying here, so that's really good to see. I use a humidity chamber and also have seen the beginings of fuzz, I dab w a q-tip w alcohol. As a general matter I am realizing you do not need it to be that humid in the chamber, but it will dry out quick if you leave it a crack open permanently. leave it open a few hours to dry out. It should be warmer in there, I hope your heat mat has a thermometer, if not, get one. $32 on Amazon. Put a humidity thermometer in there as well. It should read about 80%. But your cuttings need not be glistening. My T5 lights evaporate enough water to allow some misting, but you do not need to water the cuttings very much, at least not until you see roots. As Ottawan says, some cuttings just are of particular quality that not much can be done with them. It can be frustrating.