i ran out of liquid so after i bought a couple bottles online i went to the nearest e-cig store and bought a bottle since i needed liquid right then and there. i got to the store to find out they didn't sell 70/30 pg/vg liquid, so i had to get 50/50 with 18mg nic. i filled my tank, let it sit awhile, took a few hits and holy crap was there a lot of throat hit and it was harsh to. why would 50/50 liquid with 18mg nic have more throat hit than 70/30 pg/vg liquid with 18mg nic