Also depending on the ageb of the fridge,it could be a bad seal or the door is not closing correctly from a dish towel or other object in the way.

He stopped complaining and his wife started doing my dishes.

Second, some people live like pigs, the last thing you want is a party house or the dishes never done.  

In the past I have used Lowes stock shaker cabinets for my rental, but i found that because box is presswood and the doors are laminated mdf, the base cabinets doors swell if liquids get on them and not immediately cleaned. the cabinet also swells if there is a leak. my thoughts for my next rental were to go with all plywood cabinets and doors, but they cost almost 3x more. then i though maybe i can just buy the plywood cabinet lowers and buy the cheap stock cabinets for the uppers since people dont usually put wet dishes or spill things from the upper cabinets. has anyone done this?

A lot of damage can be caused by a messy interior - not even a gross one, just food and dishes left all over, wet towels on the ground, etc....They'll attract rodents, bugs and more including snakes that want to feed off the rodents.It is your business when it involves potential damage to your property.Schedule inspections (legally of course) and note any egregious conditions.

@Mindy Jensen has done a few if I remember correctly from the podcasts and she probably has plenty of posts about washing dishes in the tub and sharing a bathroom with no door!

Pool chemicals, service calls, broken furniture, dishes, etc. all add up. 

The dish photos are a nice touch! 

It's not only bathrooms that are a cause of issues but "Cooking, bathing, drying clothes, washing dishes and other everyday activities add moisture to the air.

@Lance WilsonRelatively easy fix for the floors, rent a small floor scrubber/buffer from Lowe’s, Home Depot, wherever, get some dawn dish detergent, and a little bit of water.