No, I wash my face every night but I really don't see how it could "age" your face 10 years??? What's the difference in going to sleep with foundation on your face or putting a nighttime cream on your face. They are both "lotion" type substances. I could see if you had really oily skin that it would be a problem, but you would think that wearing it 12 hours a day would also be a problem.
I think that's just an old wives tale.