Good Day , dionysuskiss
mine are XCUBE 2 | Crown Uwell | Clone Hellboy.
I am a beginner, just vape for 3 weeks old..
I have questions, it might sound stupid..
why there are some stains / particles building up on the coil?
what are they? the coil were not burned, the stain can be wipe off with cotton buds.
Thanks for your attention!