Clean a Cast Iron Skillet with Used Coffee Grounds

I usually use salt to clean my cast iron skillet, but this morning I was about to pour my coffee grounds into the garden when I realized I could use them to clean my skillet. Just pour used grounds onto skillet with a bit of water, scrub, and rinse. (I pour the remnants outside.) My overly thrifty mind was thrilled to save the few cents I would have used in salt! And yes, coffee grounds work great!