Do you offer any courtesy services for existing tenants?

[Account Closed]

I inherited tenants three houses on shared lots. 

One tenant whose lease is up for renewals complained about rats.  His lease doesn't address who's responsible for pest control. The other homes lease state that it's the lessee whos responsible for pest control. 

I'm thinking of having my guy treat the exterior w/ trap and spray as a goodwill.  I'm going to treat all three of the yards, since I have a good deal on services. 

There is deferred maintenance and this a low hanging fruit. 

Do you think this opening a can of worms by performing courtesy services?