When to remove ashes - by Jimmy Akin
Jimmy Akin, amazingly famous Catholic apologetics maestro, wrote a post about ash removal etiquette, where he shared this pearl of wisdom that made me laugh out loud:
"Once that goal is accomplished, you can wash them off at any time--especially to avoid things like getting them on bedsheets--though if you can leave them on longer then it is a good public testimony to one's faith.
I would definitely not have them on the day after Ash Wednesday. Then you'd look like a nut and the good of a public witness would be undone."