For some reason I'm having mold issues with my Reptichip substrate. Even with a new block, I get surface mold in about two days. Just mixing up the substrate lightly will mix in the mold though, not sure what is causing it. But I can't keep it too moist or I get a bunch of mold. Seems like I may have gotten a strain of mold that likes coconut husk, I didn't have mold problems for months and then all of the sudden it popped up. Because of that I tend to keep it on the dry side, try not to let it completely dry out, but if I see a stuck shed I spray it down real good and that usually gets the she off. In some cases I do give the snake a water bath but never leave them unattended in the tub, I keep the lid off and help them stay in the water. If they are freaking out I don't push it, maybe one minute max, and I usually don't rub them at all until it's falling off without much help. My retic seems to get the worst stuck shed out of all my snakes. Even with my mold problems the coconut husk is still the best substrate in my opinion, keep the smells to zero and keeps the humidity up.