Sometimes when you attempt to send your Scooba on a cleaning mission it may stop and not put cleaning solution or water down on the floor.  When that happens you can use this tool to inject a small amount of liquid into the internal water pump mechanism.  Once that is done the Scooba will be able to apply liquid to the floor and run its cleaning mission.  The tool is $6.00 plus $3 USPS shipping.  Just paypal $9 to e_vickery@bellsouth.net