Tenant repairs/ what to fix and what is tenant responsibility

[Web A.]

Hey BP. I have a tenant that is complaining of a broken vanity door and mirror. I had an inspection of the property prior to be buying it 6 months ago and it was fine then. The tenant expects to have me fix the vanity and blames the damage on the humidity in the bathroom since the bathroom ceiling fan doesn’t properly channel the humidity out of the bathroom. I believe this tenants kids broke the items and is now expecting this to be repaired. Is this something that as a landlord you would repair or is this the duty of the tenant?