Never had any problems wicking with mine and could go alot higher in watts (25-30w's) than wat I would normally go as I used it for mtl around 12-15w's it can be abit of a pain to wick but once you get it right it's a great rta. If you can could and wick a kfl just do it the same way with the dvarw put 5he coil in and put the cotton in and then the juice barrel peice with the cotton coming out of the you and gut close to the edge push the cotton down add juice and then just play with the cotton till it sits against the juice holes don't stuff it right in to tight also make sure the coils isn't to far down either