Remember the most common issue with Kayfuns is too much cotton. There have been times I thought ok this isnt nearly enough...but Ill try it. BAM! Perfect vape.
I went through this for the first 3 days after getting my kayfun.Another member here kept giving me advice and tips,and i finally got it.Like you,i was putting what i thought was too small,then i would get a burnt hit after just a few minutes.Pull the cotton,put in more,still thinking it was not enough,so i would try more,thinking maybe it wasn't touching the coil,worse burnt taste.That's when the other member stepped in and guided me through the whole setup,and finally with what i thought was way too small and would never work,turned out to be perfect,great taste,no gurgles,no leaks,just perfect haha.