Is there a recommended care and cleaning routine for CMRA? Team CMRA We recommend periodically cleaning the charging contacts on CMRA to ensure uninterrupted connectivity. Related articles Does CMRA work if my Apple Watch is off? Are there any risks in actually receiving a CMRA from my “Pre-order”? Can I cancel my pre-order and get a refund? How do I set CMRA up? What happens if I'm not satisfied with the CMRA that I receive from my Pre-Order?