A friend taught me to mix ~1 cup of baking soda and ~ 1 teaspoon salt with water to form a paste-like consistency. This paste is great for cleaning grease. (I get the 10 lb. bag of baking soda from Costco.) I use it to clean all the removable parts of the hood as well as the entire hood and it really works. I dip the surface of a sponge in the mixture then rub it across the greasy surfaces (with the grain of stainless steel). The grease seems to absorb into the baking soda mixture and forms clumps. Then just rinse with water or wipe the residue off with a clean soft towel that you frequently rinse. The best part is that you don't get any cleaning chemicals near your food prep area, and it's cheap! Good luck.