What to do if the cleanwater™ tub LCD screen won’t power on? The batteries may need to be replaced. Replace with two new AAA batteries. Related articles How do I care for the leather handlebar and bumper bar? What to do if the cleanwater™ tub LCD screen is displaying “Err”? My MamaRoo Sleep® Bassinet is not working, out of the box. My MamaRoo Sleep® Bassinet unit is powered on but not moving. MamaRoo® unit is powered on but not moving.