Over time, towels build up detergent and fabric softener, leaving them unable to absorb as much water and smelly. Recharge them by washing them once with hot water and 1cup vinegar, then a 2nd time with hot water and half cup baking soda. This strips the residue and leaves them fresh and able to absorb more water again. Works like a charm!
15 Things You Didn't Know Your iPhone Could Do | I knew about maybe 5 or so of these tricks because I (accidentally) figured them out on my own. But this is awesome to keep as a handy reminder of things to do.