Desitin or balmez has an adult cream which I thought worked well. Anytime I changed my mom when she was soaked I would make it a point to wash and dry her well. At night I would do a quick bottom wash with soap squirted in water then put cream in and do the same in the morning. We had great results with this routine. I noticed that the ointments and creams provided by hospice are sold at Walmart. Convalec was one of the brand names. Good luck.
Research incontinent wear, some brands wick moisture away. I found a lot of information in the customer product reviews on Amazon. My husband sleeps for 16 hours straight and has not had any rashes (knock on wood). Since I switched to a more expensive brand, I spend less money per month and have no leakage.
Why not try old fashion corn starch. Used it on my babies and my husband use to get rash on thighs in summer from sweat. Corn starch will clear it fast. Don't hurt to try.
Honey Calendula Lotion by Kiss My Face. Great for any skin condition-dryness, rash, shingles, psoriasis, wound care. Very thick, so may need to water down for some uses. Everyone I've used for ends up purchsing more. Very inexpensive, in pump bottle or travel size. Available most healrh and natural food stores. If not found anything containing calendula very good. Hope this helpful.
Don't hurt to try.
It works great, creating a moisture barrier and protecting skin.