Resident complains of “musty smell”

[Tyler Speelman]

Hey Folks,

Looking for advice.

Resident is complaining of musty smell in her apartment. Says the humidity is 60% so she bought a dehumidifier and odor eliminator plus activated charcoal to help with the smell.

Resident went into crawl space and says it is dry and does not see mold.

The crawl space has water in it in 2020 due to plugged lines, but that has since been fixed by plumber.

Plumber recently went down to crawl space to inspect and told resident there needs to be a vapor barrier.

Resident said she is holding March rent until the issue is fixed.

Side note: the resident put plastic on all exterior windows on the exterior of apartment and requested crawl space vent be closed.

How would you proceed?

Any advice would be appreciated.