And, of course, transparency is the key. If you think you might not be using enough product, you’re amost definitely using exactly the right amount.

“You never, ever want to see hair product,” says celebrity stylist Sally Hershberger. “The rule of thumb is literally the size of a dime or less.”

If that advice is not getting through, look to the Good Book for guidance. Proverbs 16:31: “The hoary head is a crown of glory, if it be found in the way of righteousness.” Amen.