[lormand]

That is already being done. When I was in San Francisco a few years ago, there is a public toilet next to Coit Tower that is self cleaning. They are all over San Francisco.

Self Cleaning Restroom

[trisham]

Those restrooms must be close to spotless, at least immediately after cleaning. Most public restrooms aren't really very clean.

The cleanest restrooms I've ever seen were in Austria. They were all immaculate.