I want everyone to buy this product so they continue to make it. I have good $s invested in colorful socks. But they get ground in dirt on the soles. I searched the internet on ways to get it out and no one had a solution but buy new socks. On a lark I rubbed this into the soles and threw the socks in the laundry bin. There is no odor so they can sit there all week. Also the product is rock hard so there is no noticable decrease with each treatment of the socks. Much to my surprise the socks came out really clean. I compared them with similar socks in my clean sock drawer and they were noticably better. I now keep this product hung on my laundry bin to rub into the socks before each wash.