I have never used a cartomizer before (coming from the cart and stuffing world). I read on another board that cartomizers are a little "touchy", and that you should only use pre-mixed juice in them. Is this true? I ask because I have some unflavored nic- liquid and a lot of DIY stuff...and I don't want to start killing cartomizers with my own mixes (plus I want to hoard Steves' juice
). Or can you use both? Any help would be appreciated.