As for joye510 atty's, I can relate.
When I first started this last Aug, I had the 2 atty's that came with the kit. Both performed great from the start. I bought about 5 more as backups. As I moved on to the backups, 3 of them performed for about a week ans then the draw was impossible. ( only using dkang tobacco flav juice , pg). Out of frustration I tried every cleaning method I could find here and each one was a mistake. lesson learned--- don't clean)
In Feb I started 2 new attys and they worked like champs from the start.
Granted, each atty is different so ( using the 'ptb made easy' cart filler) you have to get to know your attys and adjust the height of the filler or else flood city.
Just started a new atty 2 days ago and it sucked, finally threw it out and started another. ( atty's came from diff vendors)
I will assume some of the time it is me, user error in these 510 atty's, but I have found that each one is slightly different and you have to 'relearn' how to use it to make it work well, unless you get lucky and it just works great without a hitch.
I may have gotten a batch that had good ones and bad ones or maybe after 8 mths I still don't know how to figure these things out.
Worst thing about 510 atty's is the inconsistency with each new one you try.
Ready to go back to analogs but the cost and smell keeps me fighting with this 510. Guess I should just quit altogether but love my nic fix.
::sigh::