Tamkash, sadly what you are experiencing was a typical problem for some of us. There are several reasons for it, one being that your body is changing and a result of the things you are no longer giving it. This situation can last for a while ((we refer to it as the 3 month wall)), but it can happen earlier too. It was a very frustrating time for me because before that, I had some favorite juices and a battery and cart worked just fine for me, then one day it was like I was just sucking air.
It was the 3 month wall to convince me to change over to the eGo and then on to tanks and VV devices as they came available. You are lucky to be vaping at a time when there are so many options at Vapor4Life, that was not the case for me when I first started. I think you would be very pleased with a DAV and tanks. It completely changes the vaping experience for you and restarts that sense of taste. If that is not possible at this time for you, consider really changing from the current juice you are using (if only temporarily). I used a pretty heavy methol for getting through this experience, but cinnamon may help as well. The fruit flavors often seem more muted in a cart. What juice are you currently using?