Wool Dryer Balls
Simply toss all 3 balls into your dyer with a small load of clothes and press start. Use them again and again - they last for 1,000 loads! You can remove the 'pilling' on the surface that naturally occurs over time [although you don't have to: the little pills actually aid in softening].
To clean your dryer balls, place each ball in a thin sock and add a hot wash cycle with detergent. Remove the ball from the sock and dry on the highest heat setting.