From my experience I went too strong with flavors to begin with, and burned my taste buds out for that flavor family. This would last for 4 or 5 days. I mix 70/30 PG/VG, and was doing 20 to 25%. I've backed down to 10 to 15% based on the flavor and if I vape a single flavor too much, still will start losing any taste... right now, I'm vaping blue berry and it's the same as just plain nic liquid. I normally have 4 to 5 flavors that I jump around on, a few drags on one, then the next and so forth... everyone's different, you just need to play with your mix, set aside what your not tasting and keep trying... for me, I've been DYI'ing my juice for a little under 6 months, when I try liquids that I thought were to die for before, they are just wanting, so have no thoughts of going back... I'm having a blast playing with new flavors.