I don't think that's true. I've kept mine with a damp spot and she's always there. By damp I don't mean wet.B. vagans on the other hand like it dry. A waterbowl is sufficient for hydration. Also provide a hide.
If they're smaller than 1", you can use a condiment cup. If they're bigger than 1" (but under 2-3") you can use a large deli cup.I just bought them and they should be shipped in a few days I'm wondering how I should set up their enclosures
While this is absolutely true for juveniles and adults, I wouldn't worry too much about overfeeding a sling. (Many people just want to feed them out of the sling stage as quickly as possible.)I know its fun to watch them stalk and pounce on their prey,but overfeeding would have its disadvantages for the Ts,so you should know when to stop feeding them.