i refilled some of my carto's with 12mg juice and the TH is never the same, for example, sometimes one of the carto's will have barely any TH, then one carto with 12mg juice would have the TH of a 18mg juice. i refilled some carto's with my 24mg juice and it's TH was not what im used to. i like TH, but this made me not like it that much lol. the first time i tried the 24mg juice i inhaled it and was like ok this isn't that bad. then i eventually refilled one of my carto's with it and holy cow, the Th was like the TH from the first time but times 2 lol. just wondering why the TH is never the same.