To clean your Core, we recommend simply wiping it gently with a cleaning wipe, e.g. a Clorox® or Method® multi-purpose cleaning wipe.
The important thing is to avoid getting your Core wet, as this could damage the motor and void the limited product warranty. For this reason, to be safe, we do not recommend spraying your Core with water or any cleaning substance. Keep Core away from extremely wet environments (and never submerge it in water.)
We recommend that you avoid using Core in extremely hot environments (i.e. a sauna or steam room) as this could interfere with its ability to record your heart rate, and could even damage the device.
When you’re not using your Core, it’s a good idea to leave it in its charging bracket, so it’s always ready to go when you want to meditate.