I have been using my hand but there is some build up because I didn't clean it one time after I cut. I would like to find something that will scrap the deck but not scratch the paint. Any suggestions on how to clean the deck would be appreciated. On my other problem I wish I would of killed the few spots of annual rye I had last year because this it has just exploded. I am having to kill a bunch of spots. My yard looks like it has chicken pox.