I normally use a cart, but periodically, I take the cart off, take the atty off the battery and suck lightly on the atty from the mouth end. If it gurgles, I blow from the battery end like I'm blowing it out, but for a shorter time and more softly. I look inside and the wick and metal foam is all juicy with
eliquid. Reconnect it to the battery and tailpipe. I can pretty much use up all the
juice that normally comes out when you blow out your atty doing this. And it's a good dense flavorful vapor.