There is very little need to wash your clothes in anything but cold water. I actually thought that most people used cold until someone told me they use warm and hot almost all of the time. With the exception of cloth diapers, I use cold water for every load of laundry. Everything comes out clean and I don't need special detergent, either. I just use my homemade laundry detergent. So, cut down on those monthly utility bills by washing with cold water whenever you can!