Ok this is something I noticed long time ago, and has recently been brought up by another member in the Glass Vapor Genie thread. It seems that over time that the VG can shrink, I have noticed this, and the other user also noticed this. What is causing it to shrink? and if it is shrinking is it safe to inhale? I originally brought this issue up with Vaporgenie themselves. I was assured that what I was seeing was not shrinkage and there is no possible way the filter can shrink. I was adamant about the issue with them, and repeatedly told I was imaging things. Now I see another user notice the same thing. So it makes me wonder, if in the long term, use of these ceramic filters to diffuse flame is not safe. So my question is this. Has anyone else other than me and this other user notice that their filter seems to be smaller than it originally once was?