My husband has the same problem of never having a solid stool. Advice?

Oh dear, I hope you have been to doctor by now. My mom has similar problem (but is able to clean herself up....I have to do the toilet seat, floor, bedroom carpet). One thing has helped Immensely-- I fix her a pot of soft-cooked white rice. Park it in fridge. She takes out 1/4 c (large spoonful) and eats plain, or with cinnamon, or a dot of real butter (heated 20 sec in microwave), before all meals, or even as a snack. This alone has helped so much that she has doctor saying, just do that rice thing. She had tried other things like Metamucil, and cholestramine (tiny scoop with water). Basically at their age, there is not much sensation in the rectal area to give them enough advance notice that a bathroom visit is needed. When they do get the sensation, it is too late!

See the MD. Never ignore a nasty rash. Oatmeal binds, and it's yummy.