Could be as simple as your nic is too high. Now your realy getting lots of vapour the throat hit could be too harsh.Yes I prime the wick also I do dry burn the coil before wicking I use texts tuff cotton and the build was Claptam 7 wraps dule coil running at 75 w and the juice Is 70-30 more vg I have re wicked and seems to be all good [emoji3]