Wax worms are a soft-bodied moth larva that is white in color which attracts most animals to it. The taste keeps your reptiles coming back. High in fat, wax worms should be considered treats and not part of your animal's staple diet.
Other then the high fat content, wax worms are very nutritionally complete. Wax worms cannot be gut loaded but should still be dusted with calcium and vitamins.
Wax worms must be kept cold. If kept cold and dry, wax worms can last up to a month. As a general rule of thumb aim to keep no more then you can use in 2-3 weeks. Store wax worms in a refrigerator at 5-10 C and keep them dry. If their substrate becomes damp change it with any organic absorbent such as oatmeal, wheat bran or corn meal. The wax worms will not eat this. It is just to help keep them dry. Dispose of any damp substrate and do not use it as a gut load. Moisture can lead to mould which can be linked to many problems and deaths in otherwise healthy animals.