Interior Dryer Venting, Tenant Complaining About Fumes

[Mitch H.]

I have two rental units in which the electric dryer does not vent to the exterior.  I provide lint traps for tenants use.  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.  If it were gas power, I would be more concerned about proper venting/carbon monoxide etc.  In this case, Im really not sure what the tenant is smelling.

Any HVAC DIY'ers know what the issue might be?