Ok here is my problem... My wife works in some cold weather -20 sometimes and is in and out of a vehicle which is somewhat warm and then gets multiple breaks inside. Tried protanks and nauties and they both flood, I am assuming from change temperatures and pressure changes.. Know of any tanks that will hold up to changes in temperatures or does she need to move back to analogs? Even let her take my kayfun lite clone once and still flooded and filled her pocket up with juice. Any suggestions?