I am having a lot of problems with opening the Nautilus Mini tank. Unscrewing the bottom of the tank can be extremely difficult since the part that turns is so tiny and hard to grip - it seems to either get tight or either the liquid is getting sticky and making it difficult. The ring that adjusts the valve becomes a nuisance and just turns around and I can never get a good enough grip to turn the bottom. Whatever the reason my fingers are killing me and it's making for an unenjoyable experience. Does anyone have any tips or tricks to make this easier???