After about a week it seems like the poly stuffing must be melting down ,I restuff them with the Fluval fish tank filter material and seems to work as good as factory builts.Read a few articles about tea bag paper but I am not sure it would be any better than the poly.I wish someone would invent a stainless steel chamber with the element on the outside and when you push a button it sprays a mist of liquid into the chamber to vaporize it.It would probably look like an air brush machine with compressor.I guess it could be disguiised as a water pipe.