I've been a social smoker for ~15 years; I attempted Juul-ing about a month ago -- had to stop it as I was immediately (from the 1st puff) feeling unwell, super dizzy and occasionally with a massive headache.
Even if this is not linked to any "contamination" of the pods, the amount of nicotine the put in those things is just insane.
Didn't even bother giving the vaper to somebody else, I just threw it away