2 Dryerballs Tumble Dryer Balls 5 "Worked for me" Mrs MacDonald 17 July 2017 I bought these as I was looking for something to make my towels soft again. Just lately they have been coming out of the washing machine rock hard for some reason. Only thing I can think of is the water must have changed in our area. I haven't done anything different. These worked and made my towels as they used to be normal again. Thank you.