weed vape pens

i bought a randy's troo dry herb vape the other day and every time i use it i always smell this really strong smell coming from it that smells like a really bad fart and it doesn't get my very high and i know it isn't the weed itself. does anyone know how to make that go away or what it is...

http://www.rollingstone.com/culture/features/are-weed-vape-pens-safe-w507084