I had to resort to use of a garden tractor to work my grass into worm feed for my stock here recently and hate scraping the crud from under my belly mower every two or three days. My solution was to get a can of store brand mon stick vegetable based cooking spray to keep in the tractor shed. Now when I spray the belly mower down and wash the built up clippings off the underside, there is a lot less to pry off. Using the non-stick spray on the mower deck prior to rolling it out of the shed to cut my acre of worm feed now keeps the grass build up on the deck underside at 1/16 to 1/8 of an inch every three cuttings , where before I often cleaned as much as 2 inches of crud off every three cuttings. Also the spray doesnt hurt the moving parts under there and its tolerable to my worms where petroleum based arnt so good.