The sensors are water resistant, if the sensor comes in contact with a fluid (e.g. water), wipe the sensor with the cleaning wipes and continue using it.
The sensor may be worn while washing your hands - but should be removed when showering, bathing, or swimming. If you plan to participate in an activity that will cause the sensor to be submerged, please remove the sensor, set it aside, and reapply after the skin has been dried thoroughly.
You may need to replace the adhesive if the adhesive is wet.