These dryer balls work exceptionally well! I was a little bit doubtful when I purchased these but after using them for a month - I'll never go back to buying fabric softener sheets or liquids again. When drying the bed sheets, they don't ball up anymore into one big lump, the dryer balls help keep the flat sheets and the fitted sheets seperated. There is no film or staining like you get with fabric softener (especially the sheets), AND, the laundry comes out static-free :)