I've had my DSE901 for a few days now and I've found it takes a lot of effort to draw air from it. So much so where after continious use i would get light headed. So I took the simple approach and Made the hole to the atomizer larger. Disconnect the battery, take the cart out, and very slowly and carefully bored the hole out. I made it 30% larger (barely noticable without a magnifier) and that yeilded a significantly easier draw, more vapor, and a slightly smoother hit.
Thuroughly clean before use to remove any filings (it seems boiling is the most recommended method, and an ultrasonic cleaner would be even better)
I don't recommend it if you don't have a steady hand, you could easily slip and drill through a wire or something. Also if you drill the hole too big the pressure switch might not activate. You risk destroying the atomizer all together so do this modification at your own risk, and don't blame me if you short something out and your battery explodes, you inhale metal shavings, or if your kitten scratches you. It's a risk but I just thought I'd share my own experience.
Thuroughly clean before use to remove any filings (it seems boiling is the most recommended method, and an ultrasonic cleaner would be even better)
I don't recommend it if you don't have a steady hand, you could easily slip and drill through a wire or something. Also if you drill the hole too big the pressure switch might not activate. You risk destroying the atomizer all together so do this modification at your own risk, and don't blame me if you short something out and your battery explodes, you inhale metal shavings, or if your kitten scratches you. It's a risk but I just thought I'd share my own experience.