1. Rinse everything under warm water until you can't smell your juice any more and until the wicks look clean. Dry everything and blot the wicks dry. Fill with new juice and vape. It will be light tasting/vaping until the water is totally gone from the wicks and might give off the taste of the last juice but it will switch to your new juice pretty fast.
2. Rinse all under warm water, dry and switch to the other coil head it came with.
I have 2 Pro Tanks and 4 juices I use on a regular basis so I clean and vape a lot. Have 3 more Pro Tanks coming in today's vape mail so I won't have to do that as much...well until I have more juices I use in my rotation that is.