Millions of hours are spent washing dishes. In restaurants and homes, dishes have to be washed. This is a task that can be completely automated with the technology we have today.
A dishwashing robot or machine that takes dirty dishes as input and outputs clean dishes. This is an inevitable problem to solve, as Elon Musk would say. We have the technology with deep learning to be able to know when dishes are dirty and continue cleaning them.
Rather than have a dishwasher in your house, you could have a small machine that you put dishes in as they get dirty and they come out clean. This would be the first step, but you could build out processes and make the machine better as time went on.