I'm a new guy so I apologize if this is a duplicate post. I wasn't able to find anything related.

(2010 Mazda3 S)
Yesterday I noticed a puff of white "smoke" coming out of the vents in my center console when I turned my AC on. I attempted the tried-and-true "turn it off and back on" maneuver and the haze didn't appear again. However I'm sure that its the start of somet AC issues and I'd rather get ahead of it. If I take her into the dealer, what should I tell them to check and about how much will it cost? Also, is there any kind of fix that I can do at home?

Thanks in advance!