Bounce Dryer Bars are the greatest product to come out for a long, long time!! They are very easy to use... just stick them to the inside drum of your dryer, and forget until the words "replace" appear. The one I got lasts for 2 months, and works extremely well!!! It softens your clothes, prevents static cling, never leaves a sticky residue, and makes your clothes smell so nice and fresh, without a heavy, overwhelming smell. There is no easier way to soften your clothes with a sweet, light scent than with the Bounce Dryer Bar!!! You don't have to remember to put the fabric softner in the rinse...