According to Laundry Experts, You Should Be Washing Your Sheets at Least Once a Week

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Ignoring the washing machine itself
A washing machine also needs occasional cleaning. Detergent residue, moisture, and dirt can accumulate inside the drum and detergent drawer.

Follow the manufacturer’s instructions for cleaning your machine, and leave the door open after use when appropriate to help the interior dry.

How to Make Weekly Bedding Laundry Easier
If changing sheets feels like a major project, the trick is to make the process simpler.

Keep an extra set of sheets
Having at least two sets for each bed means you can put clean sheets on immediately and wash the used set later.

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