yeah do not put it in the microwave, esp if its glass and has cool colored designs, unless you want a broken pipe. I think both types will work, I always get the highest % on the shelf. Then you want to pour a bunch of salt into your bong (salt does not dissolve in alcohol so its forms a nice abraisive to get the resin off. Seal off the openings and swish around for a bit. Repeat until satisfied. Rinse well with lukewarm water.