Have you guys tried these yet? Amazon has the Wool Dryer Balls XL Premium Reusable Natural Fabric Softener (6 Pack) Only $9.83 when you use coupon code BAK2SKL42 at checkout! (Reg. $17) These have over 16,000 great reviews, so you know they have been tested. I have a set of these I keep in my dryer and swear by them! It’s cut my drying time down which was awesome and a money saver. Keep in mind, Amazon pricing can change at any time! Don’t wait to purchase this deal or it might be gone when you come back!