Sadly on mine the spring loaded bottom door (that holds the mouthpiece during transport) had the tip of the retaining clip (also spring-loaded) break, so I can't close it anymore. Unsure I could DIY fix it... but I practically never use conduction vapes these days, and if I do because say I need something ultra stealthy, I use the Flowermate CAP or preferably the CeraWax 510 on a regular e-cig mod (this one people really have no clue it's not an e-cig)
It's a bit of a shame because this vape saw practically no use. Anyway the airpath isolation on this one always seemed sketchy at best, so no real regrets...