Pro-Clean Reservoir Pad for Braava Floor Mopping Robot Dispenses liquid throughout cleaning cycle to keep the cloth damp. Fluid dispenses at different rates depending on floor type and solution used. The first time you mop, start with the cloth only slightly damp and then increase the starting cloth wetness if needed. Dampen the blue Pro-Clean microfiber cloth and press onto the velcro strips. Do not use a dry cloth. Fill the reservoir over a sink as a small amount of fluid can leak out when the fill cap is closed.