A glass of water with a TON of lemon juice in it will help to cleanse your palate too. Menthol works, but if it's too strong, everything will taste like menthol for a while after you vape it. And the menthol flavor is damn near impossible to get out of a tank, so if you go that route, have a separate tank devoted to menthols. Best advice is to switch up flavors a couple of times a day to keep it from happening in the first place.