How can I get my mom to clean up after herself?

She may have developed a fear of bathing, or she may just forget that she didn't bathe and think you are wrong. Her sense of smell could be going, as well. She could be depressed and not care. There are many reasons for this common, but frustrating problem. You may want to read this article on agingcare.com which discusses this issue: https://www.agingcare.com/133877
Take care,
Carol