After loading a meth pipe with fresh shards you need to melt them down to puddle and then blow all the residue smoke out while allowing the puddle to cool down. Once the puddle has cooled it will have become one giant crystal. What this does is allow you to burn some, if any cut off and also keeps the shards from flying in your mouth. You can now smoke your meth.
I just loaded a fat ass bowl of some of the best meth in town. Let me crack it back and hit it a couple times then I'll pass it to you.