blow it out but then again I only drip so its easy lol but its the same principle with a cart really. You can
vape through the change as well (it never bothered me it goes away fast if you switch carts over) - really depends on the flavor; some mix really well, others not so much. With the 'not so much' ones just drip a couple drops of the new
juice on the bridge of the atty to speed up the process.