I'm having issues getting flavor in my cartotanks. Especially with dark juices and lighter flavor profiles. Are there just some flavors you avoid in a cartotank? Or certain cartos that I should be getting to get the best experience? I'm trying Boge slotted cartos at the moment, but wicking dark juices is still a problem there. All my juices are 50/50. I got some Ikenvape Mega Nitro dual coils but they only have 1 hole...I was thinking they were the newer non filler ones but they weren't. Haven't tried them yet. I just keep hearing how great flavor/vapor is in these and I would like to get there myself.