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If you're like most people, you probably assume that your washing machine is the cleanest appliance in the house. After all, it spends all of its active time agitating away with hot water and soap!

We independently review everything we recommend. When you buy through our links, we may earn a commission. Learn more› By Andrea Barnes Andrea Barnes is a writer covering large cleaning appliances.

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 ...