take it to a specialist, not necessarily the dealer.............
Meh, I never liked those DIY A/C cans available everywhere. I recently had an issue (yesterday) with the A/C on my Civic. I took it to a specialist (independent garage near my parents place). Dude hooked it up to a special machine and saw I was 1/3 below the pressure I was supposed to be at. So, the machine evacuated my A/C system (vacuum), filled it , put dye in it (we suspect a small/slow leak) and I was off. Cost me $89.00. Guy even said those DIY cans should only be used in an emergency and even then most of the time won't help the real issue. Most issues come from leakage.
OP: glad you got your issue resolved.