Hey Cookie, welcome!
Is it a "no taste" thing, or "everything tastes like crap" thing? The no-taste thing could be dehydration, it's amazing how oddly that will affect your sense of taste -- sometimes just drinking a lot of cool or cold water can help a lot. Or, vaping something with a really strong taste, like peppermint (Halo's Kringle's Curse is a really STRONG peppermint and really helps) or cinnamon -- but, you have to use a glass tank for most cinnamon, especially if it's cinnamon redhot rather than baker's cinnamon. The very best cinnamon redhot I've found is from Killer-Juice; not too sweet, not too hot, just about right.
If it's a tastes-like-crap thing, have you been using the same coil since you started? You may need to replace it, or dry burn it to get rid of gunky buildup that truly tastes nasty, a really burnt yucky taste. It came as a real surprise to me after about 2 wks with my first bottom-coil clearomizer that those coils don't last forever, and in fact I was very fortunate to get 2 wks out of my first one.
I vape the same flavor about 98% of the time, and I've had *very very little* incidence of the so-called vaper's tongue, and I struggle daily with hydration -- so much so that I have to drink powerade to prevent leg cramps. Also, many times if you eat something salty it really helps; maybe *because* eating something salty kinda forces you to drink water. I find I have to turn my wattage down a great deal after a meal, or eating much of anything, or the throat hit is so strong it chokes me; eating really brings back the flavor of vaping. For me, what seems to bring on a slight "numbness" to taste or throat hit is just vaping too frequently, one puff right after another; if I give it a couple minutes between puffs, my mouth doesn't get so accustomed that it just turns off.
Andria