Quick answer: Remove atomizer from battery and take out cart. Hold a paper towel under battery end, blow hard into it from cart end several times. This should force the
juice out of the atomizer. You'll see it on paper towel. Now screw back on battery, and dry burn - not too long tho. 2 or 3 times at a few seconds like you would during a hit. Drop a few drops of
juice you like on atomizer, fill up new cart with juice and you should be good to go. You can clean the old cart by soaking in rubbing alcohol a few hours, but be sure to let dry thoroughly - like a day or two, before use.