i have been vaping for about 3 months now, using a dse 801 penstyle, and the longest i have been able to use an atty is 12 days. first the vapor production beging to decline, so i blow it out and/ or alcohol soak it, and the first few pulls are excellent than the vapor trails off rapidly. and a day or two later the whole thing dies all of a sudden. is this an acceptable/normal amount of time? my girlfriend uses the same model and she has gotten almost 2 and a half months out of hers. am i pulling too hard, too long, too often?