I'm willing to bet that it is a humidity issue.... I used to live in a place that was naturally kind of damp.... I had the same problem, no matter how much I shook the plastic, or what kind of plastic I used... Then I moved to a place that is much less humid and don't have those problems... I would try storing your plastic in the driest place that you can find...
As far as plastic goes , I don't think that you can go wrong with either of the do -it plastics... They are both superior products... I tend to prefer the essential series for my needs because I am finding that the baits are lasting longer than baits made with crystal clear because of the elasticity....