Guys.. I just got my Kayfun lite (clone) a few days ago. I watched some videos and filled it up... man, I cannot get the machine oil taste out. I tried soaking it in alcohol, vinegar, boiling water... I still taste it. And also.. it's leaking. It's probably because I'm a noob, but I wish I could get it working as nice as all the people who love it. Maybe rebuildables are just not for me... I always feel like I get really harsh throat hit too. I tried using the prebuilt coils as well as making some of my own, tried silica and cotton... still feels harsh. Cotton feels more harsh to me than silica. Guess I should stick with my clearos and cartos?
To get rid of the machine oil taste you have to fully break it down, o-rings, screws & insulators and clean it. Why it leaks probably because of bad threads or the chimney o-ring is missing in the top cap. If the kayfun can get air in its going to leak. If it has bad threads you can add a couple of wraps of dental floss under the tank o-ring to make a tighter seal. If it the threads whatever you do it isn't going to last long.
Not all the kayfun clones are bad but a lot are, tobeco, hcigar and ehpro make good ones for the most part. Get one from a place where you can return doesn't work. There are tons of online stores that do this.
I'm from the UK so I can only recommend ones Ive used in the UK.
Tobeco Kayfun Lite Plus Rebuildable Atomiser Clone
Hcigar KAYFUN 3.1
Ehpro Kayfun Lite Plus - Grey Haze ECig Store
All these places have the best customer service.
Ive got 5 kayfun clones atm and non of them are as good as the real one, they vape similar and but the quality is not as good. The real one is worth every penny imo.
Good Luck and don't give up on the kayfun.
If you want a real one then I can recommend
SvoeMesto - Cloud 9 Vaping
They also have super good service.