When do I need to replace my Pad Cartridge?

The Avive Pad Cartridge must be replaced after the sealed pad packaging has been opened. The Pad Cartridge is single-use, disposable and must be replaced after the expiration date is reached or the Pad Cartridge has been used. If the Pad Cartridge expires, it will need to be replaced. The expiration date can be found on the back of the Pad Cartridge.