Just tried some new nic and I'm feeling light headed, 1st batch was a recipe I've never tried so I put it down to that, so I tried a shake and vape tonight and I'm getting the same, the pg and vg are good , so that's not the problem, the first batch was harsh on the throat but I'm not getting that yet. Hopefully it's a bad batch, got 2 more litres unopened, could send that back or try it