I can't find any threads on this. Today I picked up a pen vape designed for wax not liquid, and smoked some wax from it. My question is, how do I know when it's time to replace the wax? Or is it good until it's completely gone?
The only thing that would be left behind are impurities. But that could be dirt from your fingers, dust, etc... doesn't necessarily mean the wax is dirty. Plus, the coils/springs/wicks will eventually soil. If it still looks a bit wet and/or oily, you might get a wispy hit, or two.