There is a system that has been around a long time used to clean mowing decks. I have seen it in use and it seems to work pretty good. If you have one blade, it works like this. A fitting is bolted to the deck. The fitting has holes in the bottom of the fitting to squirt water. You hook up the hose after mowing, and turn on the water for about 5 min or whatever. You know water is hard to compress, so the fast turning blades hit the jet of water and slings it all under the deck. If you can use a drill, you can make your own fitting. It shouldn't cost you more than $5.00. Try it, and I think you will be satisfied. It does leave a wet green mess, so pick your spot to clean. It works best if you can aim the jet at the lifting part of the blade, If you have three blades, use three jets.
