Yes, Cheese cloth does work for attatching mushrooms to rock. It can be purchased in any major grocery store. I tried this recently, and it work pretty well for the most part. The only problem I encountered was that the cheese cloth seemed to get torn apart after just a few days, either from the hermits, or it's deteriating in the salt water enviroment. Anyway, it works, and they should attatch in just a few days. Good luck.