my 2 pence worth

IF you have been
vaping since your join date, the problem may lie in dead taste buds. What to do?Scrub your tongue during oral hygiene, use Biotene products and wait. They will return.
This is my "Why did I lose the flavor answer"
Mixing three flavors together:
Flavor one has molecule A,B and C
Flavor two has molecules C, D and E
Flavor 3 has molecules C.F and G
This is a very simplistic explanation and far from the actual number of molecules FWIW
As you can see from the illustration molecule C had become dominant and may be a NON flavored molecule needed as a carrier or as a preservative, hence the dominant flavor is no flavor. In another instance, one adds double flavor and the dominant is another molecule which adds the bitter end of the flavor spectrum and one ends up with stinksock,com
e-liquid.
MORE is not MORE in many instances it becomes NONE or .... paste.
Keep trying and best of luck and happy
vaping
This is just from my experience and my opinion alone after making kilos of .... paste and drain cleaner. Practice and good taste buds always help and a little bit of lemon and or sodium chloride,