rigacci

So I have a Peak Pro that I use for Concentrates. Works great. But I have a question about how long does the THC last? After I dab a few times, there is still some concentrate left in the bowl. So at what point is the THC exhausted from the oil? Does the THC last as long as the oil or does it separate with the heat and be consumed before all of the oil is consumed. I want to be sure I am getting the most from my rig. Thanks to anyone that can help.