I got 13 juices on Vision Ego 2.0 Clearomizers (the ones with the replacable heads) and... have not had problems with ANY of them... EXCEPT... the one I have PureSmoker Firecracker (a cinnamon based juice) on, and THAT one... the mouthpiece was swelling... expanding where it meets the silicon cover... as well as at the top near the O-ring... and... I replaced the mouthpiece but got SICK from vaping this.. including swelling in the troat.
So, you bet, will not be vaping THAT one again <g>.
The steel mouthpiece would help for sure but.... the tube was clouding over as well so, I have a different plan. Have a replacable mouthpiece in the mail that has the short wicks (can get them from Avid Vaper... is a clone but is essentially the same)... and my plan is to cut out the top of the silicone cover, removing the nipple, remove the mouthpiece, remove the tube, put a 306 Delron drip tip over the remainder of the silicone cover... and use what remains.... to drip. I have not done this yet so will have to see it if works.
Yeah, why not just use a normal atomizer to drip? Well, normal atomizers cost like $9 (I use ciscos) while I can get the replacable heads for just $2.60, and this juice has clogged up normal atomizers in the past with me so, using the visions makes this juice cost effective.
I have used this juice off and on over the past two years, dripping and in bogies, and, it has never caused me any problems. It's just that cinnamon based juice does not get along with the Vision clearomizers.
I have a couple of Vision V2 clearomizers... the one's without the replacable heads... the CE4s are a clone of these I believe and... you guessed it I had this same juice in one of these and it caused the same swelling. The mouthpieces used on both of these versions are the same.
Z
P.S. I think the problem comes from having the cinnamon based juice up against the plastic for an extended period of time... in other words... continuously. When you vape one of these some juice gets trapped way up underneath the o-ring, and this was one of the places the mouthpiece was molting. When you drip, the juice is essentially gone after you are done vaping and you do not have these problems.