You're pulling your warm laundry out of the dryer, blissfully unaware that your washing machine just committed treason. It didn't leave your clothes cleaner than they were before you put them in.

Add Yahoo as a preferred source to see more of our stories on Google. Aphiwat Chuangchoem / EyeEm via Getty Images No matter how careful you are with your favorite clothes, there's always some stain ...