How mobile is your mother?
My mother has worn incontinence pads for many years now.
As time has gone on, the last 3 years, she has become less mobile.
I would change her pad 5 times a day and I would wash her bottom afterwards with plain water. The care workers would use baby wipes.
It was rare that she got a red bottom, if she did then we would use sprilon or sudacrem, both very good. Srilon available on prescription.
My mother sits down all day in a recliner chair and only gets up when she is taken to the toilet.
I hope that while she is in the care home, that she doesn't develop any pressure sores.