I have a few VV/VW devices with Kanger tanks that share the space with my Reo Mini. Having said that, I get a little lazy with maintaining the Reo. I just fill and vape. I started noticing that the vape was not real efficient with the Reo. But I kept chuggin'. filling and vaping. The yuck tasting vape was getting worse. I was thinking maybe the year old RM2 had lived it's life expectancy. Fast forward to about 3 weeks or maybe 4 weeks later, it occurred to me that just maybe the cotton wick could use replacing (yikes) OMG the wick had pretty much disintegrated !!! It was just a mushy puddle of gunk !!! Got the RM2 all cleaned up, dry burned the coil, made new cotton wick, and HOLY COW, the Reo is like it was brand new !!! I vow to change the wick weekly from here on out ! It's all in the wick folks !! Keep your wick new and clean, the Reo wont let you down. So happy to have my Reo back as the leader of the pack in the vape family.