What I do for my 11' female is I take a bath towel and fold it up (like its hanging on the rack in the bathroom) and I wet the top two layers thoroughly. Not soaked just nicely damp. Put it in the cage and most times the snake will lay on it. Remoisten with a spray bottle daily and your burm (or any snake) will shed nicely. For small species I use washcloths or even smaller (BPs), folded up toilet paper in their hide box. Works great.