If you can't taste anything on another mod with different juices, its vape tongue, no doubt, sad part about it, is especially when you first start can last couple days up to a few months, everyone is different, though you can improve the situation a bit to respark you taste buds.
1) As Kprthevapr above posted, mouth wash, help cut down on any excess VG build up on your taste buds and drink plenty of water, and liquids, orange juice, grapefruit juice, lemonade, and tomato juice surprisingly helps cut VG and other things due to their acidity.
2) You'll need a glass tank or a simple RDA for this, but Cinnamon Red Hots flavor, hot cinnamon is also acidic (thus the glass section on a tank and not plastic), also a citrus style vape also can cut VG build up down as well.
3) A Menthol flavor or straight menthol, surprisingly especially spearmint based menthols can really awaken taste buds.
4) Vape on a liquid with, this one is weird, a cucumber flavoring mixed with a light spearmint and fruit flavor, the cucumber very surprisingly cuts vape tongue down real quick.
5) If none of the above work, switch to an unflavored liquid, you are not getting any flavor why pay the premium price as all you are vaping for by then is just to get your nicotine. Nude Nicotine and several other DIY liquid vendors offer nic base a lot of times in your preferred or close to preferred PG/VG ratio and nic level, and is pretty inexpensive.
6) Chew on cinnamon or mint gums, or have cinnamon or mint candies on hand until the vape tongue is rectified.