Even if you have your laundry routine down to a science, you might not even know that your washing machine has a lint trap—much less that it requires regular cleaning. But, much like your dryer’s lint ...

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. Liudmila Chernetska / Getty images A washing machine that isn't working properly results in musty, odor-ridden clothes at the end ...