yes, my dc has done this - he does it without realising he's doing it and I try to mention to him each time to remind him to try not to as it gets really sore. Nothing seems to work, simply a case of dc remembering not to do it and trying to break the habit IME.
I'm another Elizabeth Arden 8 Hour Cream fan. Used it on very dribbly DD (now 16 and less dribbly) who had constant redness round mouth and chin when about a year old. Seems to be extra sticky so stays on longer and repels spit longer - it's not a cream it's like vaseline but, well, stickier. Apparently Catherine Zeta Jones used it on her ds's nappy rash .
Maybe you need something that tastes a bit yukky to help break the habit? (Is that a very old fashioned thing to suggest?)