i have heard from many people that handling the meth too much reduces its quality. it apparantly "taints" it.. also, putting it in a bag with any other substance, for example i once bagged up a gram for a friend.. used a bag that had some rubber o-rings in it.. took them out of course, but they complained it had been tainted and was useless. my friend had to give them another g. i was shocked... literally didnt believe it.. but my friend said its true.. and i dont think he would have given out another g if he didnt believe them