It has nothing to do with the draw. I know that because all I have to do is push the button, with my hand on top of the drip tip and the juice is so hot it will burn my hand.
I've even tried long drip tips and the glass ones but nothing seems to work.
OOps sorry but I am not debridging them, I don't think the HH357 or the aero's have a bridge to begin with.