New paint, maybe hiring a designer, adding any new amenities that might bump you to the top. 

Unfortunately, if you don't have the resources, its not very possible.here is my sort of "truth vs. reality:"  I think we'd agree that its true if you were a professional athletes you make lots of money (male more so than females, but that's not the point). 

Did you work with any real estate professionals (agents, lenders, etc.) that you'd recommend to others?

@Rebekah Bloom it's still pretty vague in your description. 1) What does your property currently rent for (market rent). 2) What did your previous hired PMC charge? 

While the tenant believes it's dry enough and livable, it's crucial to have a professional mitigation company evaluate the situation thoroughly.

Did you work with any real estate professionals (agents, lenders, etc.) that you'd recommend to others?

Did you work with any real estate professionals (agents, lenders, etc.) that you'd recommend to others?

Did you work with any real estate professionals (agents, lenders, etc.) that you'd recommend to others?

Your best bet would be to hire a hygenist to come in and review / do sampling to see where the mold exists and they also could get you proposals from remediation companies on the cost to remove the mold.

I used to manage my property and have had more success than the PM that I hired.