I'm a decluttering expert. Here's how to know when to replace your pillows, mattress, and sheets.

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• I'm a professional declutterer and work with clients on getting rid of things they don't need. 
• The more time bedding spends in contact with your body, the sooner you need to replace it. 
• Pillowcases last three to five years, while comforters last 15 years or more. 

As a professional declutterer, I know there are some items in the house that beg to be replaced, and then there are those you don't think about all that often.

When...