If the taste and smell is bad now but wasn't for the last 6-7 months, why would you assume it's the vaporizer? You either need to clean it or use herb that wasn't grown with shit as fertilizer, or both. Blaming the vape makes no sense.
I want to like this, but... if you've seen the pictures I threw up on the virtual banquet thread, all the stuff that's grown at home is grown with... wait for it....
horse shit
Shit as fertilizer is how we got a pumpkin big enough to need the golf cart and a few people to move it. Using manure as a fertilizer isn't new tech at all, and I don't think it can affect the taste... otherwise all the fruits, vegetables, etc, would taste like shit, no?
I'm in agreement with smokum, if it's not the vaporizer that's dirty, then it's gonna be the bud, and either the terp/flavinoid profile is causing it, or improper flushing, or a shitty grow, or all three... but manure as a fertilizer isn't gonna be it, I don't think.