It’s a feeble attempt to sublime the MSM out before smoking, but I doubt it does much at an uncontrolled temperature that is not uniformly distributed. Many users do not inhale the first hit of meth when they begin to vaporize it. The vapor will also be somewhat cool feeling, like a hint of menthol. The entire pipe will be coated white inside. One of the signs of methamphetamine cut with MSM is how thickly it coats the pipe after only two or so uses. No MSM is present in this methamphetamine (it sublimates around 250 degrees, while methamphetamine has a higher vaporization temperature). This methamphetamine cracks back instantly, failure to crackback or a large delay indicates impure product. When the heat source is removed, the puddle recrystallizes with an audible cracking sound. Pure methamphetamine “cracksback” after it is liquefied by heat. I vaporized 30mg from a recently constructed lightbulb vape and found the vapor to be very smooth. The quality is top notch, melting point analysis showed absolutely no residue. The crystals break down just as pure methamphetamine should as MSM (Methylsulfonylmethane) and isopropylbenzylamine noticeably change how brittle they are. They are relatively clear and are not cloudy. The crystals are beautiful and translucent. New 1g of the best methamphetamine I’ve ever had the pleasure of coming across.