Alcohol based hand sanitizers, soap or hand lotion won't damage the ring – basically any substance that's safe for your hands is safe for the ring too.

If you need to wash your hands frequently, just remember to dry your hands properly also from under the ring to avoid any skin irritation. If you handle substances or lotions that can get under the ring, make sure to clean your ring afterwards from the inside to ensure the best possible signal quality for the measurements.

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