I bought a simple 25$ vape pen and I have noticed that my 24mgjuice doesnt produce as much vape as my 0mg juice. Could it be that my pen is not "Strong" enough? I have already solved this by filling my tank with 3/4 of 0mg and 1/4 of 24mg. I was just wondering if I should buy another pen? Also which pens do you guys reccomend? The more simple and smaller the better.