That's just part of the territory when it comes to meth. You never know how "pure" the meth is or how "dirty" it is until you smoke/snort/shoot it up. I smoke and snort it, I don't do needles. You can tell the purity of it by how it tastes and how it makes your body feel. Sometimes it's good, sometimes it's not. Just a chance you have to take if you want the drug. Sometimes I get stuff that keeps me energized and up for a few days and sometimes I get stuff that makes me sick within an hour of smoking/snorting it. You can basically buy everything you need to make meth over the counter. Things from sudafed(sp?) all the way to Red Devil Lye to Muriatic Acid... It's got a lot of poisons in it. It's crazy.