I have a bca float 32 that I purchased new last winter. It had a fully charged canister when I bought it. On my first ride with the new bag it got accidentally inflated, I replaced the o ring and had it recharged. The problem is that it seemed to have lost pressure over the last 10 months. It was good for the remainder of last winter but this winter it has dropped to about 1200. Is it normal for these things to require recharging every few months or is there something else going on. I did put it in water but after an hour I still did not see any bubbles at all, it was really boring, kinda like watching paint dry.