Tenant complaining about Mold

[Allan Smith]

Hi guys-

I rented out a 400 sq feet studio apartment about a month ago, and today my tenant says there's a musty smell in the studio, likely indicating the presence of mold. As far as I know, there are no leakages in the studio so I'm not sure what is causing it. 

I'm from Florida which is obviously very humid so even the slightest moisture exposure can trigger mold growth. The studio was vacant for the last 3 months though (A/C was still on 24x7), so maybe that could be the problem.

I'm not sure what's the best way to proceed here. Should I get mold inspection done to find the source of the mold? Or get an air purifier? https://www.amazon.com/s/&field-keywords=Ozone%20G...