To keep this short I tend to change flavors in my delta 2 quite often and have a large assortment of flavors. That being said I never have enough replacement coils to keep switching them out fresh for flavor changing. I do wash my tank every time I change flavors but I don't wash the base and coil over fear of messing something up since I don't tend to let them dry before I decide to start vaping it again. I usually don't think about the transition flavor however I made the mistake today of switching from a caramel macchiato to a vanilla banana wafer pudding so as you can probably imagine the flavor is complete trash.. With all that cotton in the delta 2 coil, how long should I expect to have to vape like this? Ten toots in and I can still taste the macchiato like the cotton is reserving it just to teach me a lesson.