Ok this may sound really simple to the veterans but a possible solution to some of the newer vaps or ones like me who never read the instructions or pay attn to the small details lol.... Meaning.... I just purchased one of these and had seen alot of ppl complaining about airflow and leaking issues from their tanks when they worked like a dream when first purchased...with that being said.... I was on my first few days and all was great but after a few refills realized the airflow was diminishing each time.... Then on the last it was just plain horrible and that last back blow thro the tank sent juice coming out and I thought.... Really? Am I gonna already start with the issues I've been reading about?... So I went to wipe it down and check the issue... I seen nothing... tried again and same issue....so I started inspecting the airflow dial and taking a pull at each click.... It was improving! It then dawned on me where I was going wrong....the holes at each click r the sizes...I kno dummy me lol but I'm sure without some admitting they may have made the same mistake of not realizing this small detail and accidentally twisting it when screwing the tank on after refilling. I'm sure some may have faulty tanks but it's worth a try to rule out.... After all there is a reason lamps come with the warning tags "do not use in shower"....lil little humor at my expense for the air flow control issue, at least I figured it out quickly bf I went in and felt stupid lol or bought umteen coils.... So after readjusting viola back to the awesome state as was when I took that first hit and no more leaking out of the holes! Maybe this will help some other newbies or others that don't buy new tanks often or follow directions lmao! 
