I've been vaping for 3 months at first i used 12 mg and would easily get a nicotine buzz. Within a month i was up to 24mg because the only effect i was getting was a little lightheadedness. Now the 24mg doesn't do anything for me and all the eliquid I have in 24 is ridiculously harsh even though its 100 vg and wasn't harsh when it was 12mg. So I want to drop my tolerance and purposely gave my ecig to a friend to hold for 7 days. I'm on day 4 and I don't feel any different accept for a headache on the second day. But will 7 days be enough to drop my tolerance so 16-18mg will give me a buzz?