Hi, So my wife soaked our seat belts in 3 of the cruisers yesterday in soapy water. She spent the best part of the morning doing it. The water was filthy in the pans after about an hour. She then washed and soaked them in clean water for about an hour. Then opened the windows to let them dry. Amazing difference, from hard and not working well to soft,shinny and fast working. She really helped us out.If you have not done this do it while it’s still hot.