Joh This is more about keeping the corset clean?
BD1791 It sounds like you don't have a particular spot, it's more of an everywhere issue? For me and my cheap chastity belt, it was much more comfortable with something underneath as well but I could still point to specific areas where the fit was bad.
I don't think I could wear a corset 24/7, but certainly it is comfortable to wear all day. It is weird that it is so hard to get a Chastity belt to fit in the same way.