If a drug dealer tenant locks a dog in the kitchen 24/7 and the dog freaks out because she's trapped and alone and tries to claw her way out, what you have is a human problem, not a dog problem. 

Originally posted by @Kurt Gardner:@Nick StoddardKeep it as simple as possible.OP specified he isn't renting C-D class properties, A & B properties garner their higher rents because of amenities, keeping it simple means you're posting on here all the time wondering why you can't rent it, these properties attract better quality tenants who take care of the properties better also you can and must put in some features to warrant the higher rents.Nick keep the ^^^^ in mind, you dumb down your rentals due to listening to people giving advice from perspectives of properties different than yours and you'll end up shooting yourself in the foot when you have trouble renting it due to your competitors properties offering more the money.Many landlords are cash flow investors, not equity investors, their properties are lower quality, lower quality tenants, lower expectations, lower rents, they step over dollar bills to pick up pennies, having a penny pinching mentality, don't fall into that trap.

After a bedbug infestation in one of the properties I manage I now write in the special provisions section: "with the exception of wood destroying insects, tenant is responsible for pest control up to and including pest control." 

(The previous tenants completely did not take care of the dryer and did not bother to empty the lint trap regularly, or ever). 

May just be a loose nut at the trap. 

If no disposal then maybe your P-Trap under the sink is not holding the water in the trap it needs to act as a barrier against sewer smell coming up from it.

They expected the landlord to pay for the extermination (which ain't cheap) even though one of their kids brought the bed bugs into the house.Since the TAR lease is silent on this issue I will be adding the following clause to all future leases:"With the exception of wood destroying insects, tenant will be responsible for the extermination of any pests including bed bugs."

Put out traps for cockroaches, of which there were none before they moved in, and we saw no evidence of when putting out traps. 

This paper backing is a vapor barrier and will trap moisture in the attic and you will have mold from the moisture trapped by this.  

That traps them into their excuse of "hygiene issues".