I only use one atomizer, and I change flavors all the time.
And this includes (among dozens of others) clove, atomic cinnacide, and chocolate mint.
I have been known to switch flavors every hour, or even every half hour.
I really don't have any problems with any flavors sticking around for very long.
What's my secret?
I'm not really sure, but I can tell you that I blow out the atomizer when I change flavors.
And when I say I blow out the atomizer, I mean, yeah, I really, really blow it out good.
Then I just start using the next flavor.
Usually, the old flavor is still noticeable for at least a couple of drags.
But even the toughest flavor is pretty much always gone within five or six drags.
My thinking is that most people don't blow out their atomizers like I do.
Dainty little blows isn't going to cut it, not even medium blows will.
It's like my wife blowing her nose.
I don't even know why she wastes her time.
When I blow my nose, the entire block is aware of it.
But my point is really this, whatever gets the old juice out gets the old juice out.
And if you can't or won't blow that hard, just rinsing under very hot tap water should work fine.
If there is ever anything that is really causing me a problem, I do some rinse/dry burn cycles.
That always fixes everything right up.
JMHO YMMV