rash? what to use?

Vicky • 28 yrs old - Dog lover - Eats everything
Hi mommies! Baby has had a rash on her inner arm for a while now. We've tried Aquaphor, hydrocortisone 1%, also a combination of both and it doesn't seem to be working. It doesn't appear to be itchy or bothersome to her. Any suggestions on what to use?