OK so I have had my 510 for about 2 weeks now. At first it produced good vapor then it seemed to produced better vapor after being used for about a week, now it is hardly producing any vapor. I have 4 attys and it is the same story with all attys. Any ideas as to what could be going on? Are my attys dirty? I cleaned them in Everclear. Also there seems to be less flavor coming from my 510 than when it was new. If anything there is more of a burnt taste than anything else. This is going on with all of my attys. Any help would be great. Thanks.