Welcome , and not necessarily , although it's not that hard . If your using very similar juices ,say fruit juices , then you could just out in the new
juice . It will take a little while for the new
juice to get to the coil , but it will , eventually . But do not try to do this with dissimilar type juices , such as tobacco , and fruit , etc . But you may come across a new combination , you may like . Best bet is just to do a quick rinse . If you have any cinnamon or clove flavored juices , or even menthol . Reserve carto's for those only .