update after 3weeks or so.
Threw away 2 tanks liao. Might be phsyocological, but i find they start to leak after using for a week or 2. But i wonder if its due to back pressure causing flooding in the atomizer.
I think i killed one atomizer too. Used to wonder what ppl say about buring taste, finally knew. Saw online someone using isoprol alcohol to clean the atties. Bought one from guardian to try too and after cleaning, OMG...... So horrid the sensation. But i tried to run a few tanks through and now its much better. will continue to monitor.