macmuffin

I have been vaping for about 3 months. I started with a simple little pen rig. As of today i bought a Sub Tank Nano, and a Itaste MVP 3.0. The problem i am having is every hit is really harsh, it produces a tingling burning sensation that last for about 30 seconds, but even drinking water does not fully get rid of it. I vape 6MG 100% VG juice. Before i switched to the new rig, i tried a few different flavors, all of them 6MG 100% VG. Some flavors where harsher than others, i had a blue berry flavor that seemed perfect, but after awhile it got old so i tried a different flavor from the same company, and it produced some of the sensations described above, but not near as bad as with this new rig. On a side note i tried lowing the voltage/wattage and that did not help. Even if i take a real small hit, it still causes a harsh hit. So could is just be the nicotine level is too high, or some how the different flavor makes it hit harsher? Thanks