Why you SHOULD (and why you SHOULD NOT) replace your mattress: Myths vs facts... Mattress advertising tells you to replace your mattress every 7 or 8 years, but your mattress doesn't have an expiration date! There are some really good reasons it may be time for a new mattress -- and some equally silly myths. Bottom line: When your mattress is no longer fulfilling your needs in terms of comfort and support, it's time to start looking for a replacement. This video explains what signs to look for, as well as some other good reasons your bed might need replacing. Prefer to read? Also see our article on Mattress Replacement: https://www.goodbed.com/mattress-repl...