got an idea from nick on another forum. i made a version of his idea. take one of these rotating sprinklers . preferably plastic. cut the pipe at about an inch an half or so.in other wds remove the sprinkler head so all u have is a plastic pipe standing an inch or so up. this type sprinkler has its own platform. slide it under the middle of your deck and turn the water on. next start the mower and engage bldes at a slow speed. worked pretty good for me today . had the deck clean in a few minutes . this can be used at customers house but u may need a platform to park the mower on. 1/4 inch plywood mabe. after u are done take the clippings to where ever u can get rid ofum. some are concerned about their spindles an the water . if thats the case dont do it ,but it sure worked good for me.