ikr You'll have a much easier time repairing a Transformer robot than dealing with kayfunv4 Good luck bro. Yo'll need it

may the force b with you.. hahahahahaha..

youtube is your best guru, bro 

I hope you didn't dismantling ALL the parts? For cleaning purposes, only need to dismantle 7 parts (drip tip, top juice filling, the juice hole with the small nut, the glass, the tank holder, the chimney & build deck)

Is got to dismantle everything.thats how u learn more from it

Okay. I'm taking it as you bought the Tobaco version for your clone.
I own 1 unit of the Tobaco clone too and had the same problem.

The source of the leak is part number 16 and I'm almost very sure about this.



Get this change and it's good to go.

https://www.fasttech.com/p/2095701

Get this pack and replace the O ring. After that no problem liao. 

The box is the biggest giveaway. EHpro one the box write big big EHpro and nothing else. Tobaco one they don't use the Kayfun style box. They put their own box and the polycarb is matt one instead of clear like the original. Infinite one need experience to tell. 
Good luck. They sell the UD coil rolls there. It's RM20 for 10m I think.
If you cannot wait, I can sell you mine first. I bought 3 sets for I also dunno why I bought 3 sets. 

If this is the case, I think we narrow down to 2 clone makers. Either Infinite or Robotech.
For the price that you pay, it should be a Robotech. 

Most of the clones are 1:1 in terms of size but the etching and engravings confirm cannot 1:1. 

End of the day, you buy the technology of the original tank for the fraction of the price of the original. And that's all that matters.

Check whether the spring in the valve is still in there, it is there to push the valve up.

where u live bro? if subang area, can come to taipan. i'll share what i know about KF4.. used it few months back