One day your going to get up and nothing you vape will have flavor.
All flavors will go mute and you will crave for the taste of that first hit where you could almost taste the flavor.
There is a lot of info out there here are some of what is advised.
a. Change your flavors up dont keep vaping the same flavor
b. Clean your tank in warm water or Vodka or IPA. Then wash. Then do a dry burn.
A dry burn is when you pulse just the coil till you see all the coils glowing red. This burns off any previous taste off the coil.
It will not bring back the flavors but there is a mild improvement.
c. Try and smoke a non flavor vape for a day or two to give your taste buds time to recover. I normally try my 50-50 100MG Nicotine mixed with PG to bring the strength down.
d. If all else fails try a carto. This will tell you if its the tank or your tongue that is acting up.
e. Drink lots of water and keep your tongue wet.
Found links which recommend the same.
http://www.cigbuyer.com/overcome-e-liqu ... rs-tongue/