Posted on December 3, 2014November 11, 2016 by Kate Wills 10 Ways to Reuse Old Toothbrushes 3. Clean your hair dryer You can use old toothbrush to clean your hair dryer. The bristles are great for combing out the dust in the filter of your hairdryer. How To:snappyliving.com Pages: 1 2 3 4 5 6 7 8 9 10