Ive heard of some people taking a cutting wheel on a dremmel and putting a small slice instead of another hole. As far as the top of the polyfill not looking wet, it dosent matter. The
coils arent at the top of the pf. As long as the bottom gets saturated, you have proper airflow and the carto still fires you should be blowing clouds! XD
That said, i bought the cheap 5ml dct from
madvapes 3 weeks ago and havent had any of these issues. Still
vaping the origional carto that was in it. Its just now getting a lil stiff, but still putting out some awesome vapor!