I'm pretty sure the blue aura thing can be easily explained by LSD, which can be absorbed through the skin.
...
Someone should get on that, unless LSD is prohibitively expensive to make. Just cover 'magickal' items with the stuff, package it in a way that the delivery personnel don't come in contact with it, and then sit back and giggle as the testimonials of auras and shit come flooding in.
The cheeto dust thing, on the other hand, I suspect is just diabetic neuropathy.
Also, Lemon, at the beginning of the bit with the guy clearly being trolled by his wife, that's a scarily good Dalek voice. Yell that shit through a ring modulator and see what happens.