an issue i've found with the iclear 16 is this - and maybe its after they've been used for some time, idk, but i find the plastic tank seems to become unseated from the smooth bottom ring. not the knurled base, but the smooth metal tank ring at the bottom.
so what happens is that it gets offset if it gets bumped or even just slightly mishandled thru everyday use. so then the head and silicone cap become misaligned with the driptip. i can hold the metal ring and the plastic tank and move it back into position, sometimes hearing and feeling a slight pop as it reseats. well, it kind of reseats. it's never quite the same and there's a noticeable gap that can be felt between the ring and the plastic tank lip.
the plastic tank will also unseat and raise up from the ring (probably related to the problem above), so even though everything is screwed in snugly, if you look you'll see a slight gap between the top of the silicone head cap and the bottom of the drip tip. sometimes i can remove the clearo and put it base down on a firm surface, hold the plastic tank, and push it back down to reseat. if i can't get that to work, i'll remove the drip tip, use some tweezers or something and reach in and pull the silicone cap up just a smidge as a temporary fix.
when these clearos are working, they do work well. but they can be a bit fidgety at times. i like the vapor and taste of them, but i've moved on to other delivery devices, for the most part. i still carry a few with me daily, but seldom use them. i also realize that although they are 'rebuildable', they're still ultimately a disposable product and won't last forever.
my girlfriend is completely satified with them, and she has been using my old ones. i just have to perform a little maintenance on them for her now and again.
