On a related note, I have a small amount of vape oil stuck to the top of my Alien Blue cartridge that needs to be liberated. Alien Blue does seem to be a little more viscous than some of HV's other oils I've tried. Any advice on how to get it flowing. I've tried heating it with a hairdryer with a few minutes but that didn't seem to help. I also see a tiny amount of condensation in the cartridge so I suspect some water found its way into the cartridge. Our humidifier may be to blame here.I'm not sure water would work very well as I reckon the ceramic wick would get soaked in water and then the vape oil might not be able to displace it properly
I cleaned one cart with ethanol but then thought about the fact that it was denatured and probably left some nasty residue on the ceramic so I haven't actually used it since cleaning. That said it worked really well clearing all the darkened brown residue on the coil after several applications and a bit of heating up. So if you can get a strong alcohol solution that isn't denatured (heck maybe even your standard clear spirits might work) then that should be fine.
Probably worth it to completely dry it out after before adding your vape oil. But use low drying temps or it might melt.