I never vape the same flavor in a tank twice, constantly rotating.
and I find that sometimes by the time I get close to the end of a tank, I need to switch to another because the tank gets hot, then it produces little vapor. I chain vape a lot.
I vape with PT2s
so when the tank gets low I put it on a ego twist, and start vaping the next tank.
once my initial tank gets cool enough I vape it until it no longer generates enough vapor due to heat and I let it rest.
so a lot of times I'm vaping 2 different flavors at once.
I rebuilt my atomizers and use cotton wicks, so I just clean out my tanks when done, remove the old wick, do a dry burn and pop in a new wick and I'm ready to fill it with a new flavor when the time comes. No flavor cross over that way either.