My parents currently live in an assisted living facility. They need more help than what their facility provides. What kind of help is there?

My dad is 84 and frail. He struggles with cognitive issues and Parkinson's. My mom is 81 and her primary health issue that is a daily problem for my dad is her incontinence. Every night she wets the bed and my dad has to change her soiled sheets. Every day she wears an adult diaper and makes no effort to go to use the bathroom. Her response when asked about this is "I'm lazy". For their level of care, the assisted living facility isn't responsible for clean sheets so the facility isn't at fault. They need help with organization and cleaning as well as the soiled sheets. My dad is exhausted and just can't take care of my mom like he has been. They have been married for 62 years and don't want to live separately. What kind of additional care could be hired to help them on a daily basis? They have long-term health care insurance that I hope will help pay for this. Any ideas, help, experiences about this issue would be greatly appreciated! Thank you!