The answer might be more frequent than you think.
Marla Mockis the president ofMolly Maid, a Neighborly company.
How you use your pillows can also contribute to a need for more frequent cleaning.
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Mock says hand-vacuuming and spot-cleaning with a damp cloth should do the trick.
Just be sure tocheck your pillows care label.
The biggest mistake people make is throwing your pillows in with a small load of laundry, warns Mock.
This can cause your pillow to lump and damage more quickly in the wash.
Instead, the cleaning expert recommends washing two pillows at the same time.
This strategy will keep the pillows from becoming lumpy.
Be sure to read the care label before washing, and follow the instructions, she says.