If you do elect to install an exhaust fan, make sure to wire it on the same switch as the light in the bathroom - basically always on.  

Have you already exhausted the 401k loan option?

Calling an inspector for every walkthrough could be quite expensive, and calling contractors for every walkthrough could be quite exhausting for them. 

Then she did some tile work in a different apartment, she fixed a toilet, she cleaned all (12) bathroom exhaust fans, cut some closet doors and rehung.

I know this is not ideal, but have decided for now, I am OK with the solution.One unit is complaining about the smell of exhaust.  

All bathrooms require either an operable window or exhaust fan to meet code.

Its also not a big deal to frame a box on the roof to accommodate the exhaust duct or vent and motor.

But only if all other means have been exhausted to get him out from that mortgage (83k upside down).  

@Marcia Maynard I was recommending he filter before exhausting to the neighbors.

@Lumi Ispas I don't understand because the RLTO in context reads:"the LANDLORD may deduct from such security deposit or interest due thereon for the following: (1) any unpaid rent which has not been validly withheld or deducted pursuant to state or federal law or local ordinance;".1) So the explicit wording seems to make deductions a Landlord right, rather than a Tenant right that is unlawfully waived by the subject lease provision.   2) Also, if a lease term requires that a security deposit be paid, then a tenant can just void that term by skipping the first months rent payment in favor of the deposit.3) Finally, Tenant application of security deposit to rent could furthermore invalidate any 5-day notices served prior to exhaustion of the security deposit.The article author appears to be an accomplished tenant law attorney.