LR306 attys

[gvil]

So I just ordered some LR306 attys as usual with some juice and these are the second time ive ordered them since the first five laste a really long time. So far ive opened 4 out of 5 but all of them have incredibly stiff draw, the vapour and taste is as usual but the draw is way to stiff. The first 5 were not like this but so far every one has been like this in this order but im guessing its not supposed to that stiff draw. Whats most likely to be the error? Its not that the vent or airholes are covered ive tried it different ways to eliminate this.