But I'm noting that trick about watering down the soap and dish detergent.

Other than that, you do not want to provide these appliances because people are notoriously hard on both, overstuffing them with clothes, using too much detergent, etc.When we rehab units we normally make all provisions that make it easy for the tenant to bring their own so that there's no reason for us to provide a washer or dryer. 

So a tenant may have gotten their lost quarter or detergent but left the landlord with thousands in repair costs. 

The "house contribution" goes to all communally used items such as trash bags, dish soap, toilet paper, laundry detergent, coffee, etc. 

The lady slipped on the detergent on the laundry room floor.

Instead use a strong detergent like Mr.