Most people know to check the dates on milk, meat, and leftovers, but expiration dates are not limited to the kitchen. Several items around the house have hidden shelf lives that affect safety, performance, security, or reliability. They may not grow mold or smell bad, yet they can stop working as intended, become less effective, or create risks when used past their prime. Understanding these timelines makes it easier to replace items before they fail.

These products do not all expire in the same way. Some have hard replacement dates, while others have best-used-by guidance or manufacturer support windows. In each case, the date matters because the item may no longer provide the protection or performance you expect.

Key facts at a glance

• Smoke alarms should be replaced every 10 years, or sooner if they fail testing.
• Printer ink can dry out or oxidize, especially if a cartridge sits installed and unused for a year.
• Routers often need replacement around the five-year mark as firmware and security support ends.
• Chromebooks have an Auto Update Expiration date that determines when security updates

  
  Source: MakeUseOf News