You should try Purilum Butter MInt! (only available from River Supply)
Anyway, when I switch flavors in my MTL tank (drop-in coils) I vape some unflavored between the flavor switch. This has also helped me realize I have been mixing (DIY) flavors too strong... taste better as it "dilutes" from the unflavored. Also dilute pre-made juices (too strong/sweet for me) BTW, my first juice ever was unflavored (actually didn't know at the time... just needed the nic)
@Coyote628 , I went through the same thing (ironically just when I had mixed a bunch of DIY testers) Had to wait to test them... actually joked "I might as well vape unflavored" When your taste returns, everything will taste extra good.