Cloth or disposables, it's important to use 4 different approaches to maintain health skin.
First, always spend time airing out. I find laying on my bed under a ceiling fan works the best and is the fastest approach in just 2-4 minutes. Whereas sitting on a toilet can take 30-60 minutes to get the same dryness.
Second, "diaper cream" is a cream that you rub into clean skin and it gets fully absorbed by the skin. This will help heal any skin that is already irritated or with a rash. A common one is Desitin creamy, though I prefer a prescription called "triple diaper cream" (not the over the counter triple diaper paste)
Third "diaper ointment" is applied on top of the skin to create a protective barrier and help prevent irritation from developing. Pretty much any OTC ointment like desitin or a&d will work. Just make sure it has zinc in it.
Fourth, powder is used to help dry the skin. This is best used after you dry out, and normally is not used when you have or want to apply ointment, as the powder tends to mix with it and clog up the diaper.