As It Happens, There Is an Appropriate Method for Cleaning Pillows.

Feather Cushions
Feather pillows may also be washed in the washing machine. You should use a little detergent and make sure the machine is set on the delicate cycle. Adding an additional rinse cycle is also a good idea.
Throw some tennis balls in the dryer for inflated pillows. Additionally, it's not a terrible idea to remove them and gently plump them many times. Carolyn suggests setting your stinky pillows out in the sun for a couple of hours to air out.
Stuffed Cushions
Foam pillows are not machine washable. On the other hand, most of them include a cover that you can simply wash in accordance with the instructions on the label. You may vacuum the foam on both sides after removing it from the cover to get rid of any dust or dirt.
Drying the foam separately in the dryer for around 20 minutes on a no-heat or air-only cycle is another possibility. To remove stains, Carolyn recommends dipping a cloth in a gentle soapy solution and then washing the area with a moist towel. Before placing a wet pillow back on the bed, make sure it is completely dry.
Keep in mind that you will have to buy new pillows at some point, even though you now know how to clean various kinds of pillows. Carolyn advises making a shopping trip a priority if a pillow does not return to its original shape after being folded in half.
I understand. Go ahead and throw your pillows in the washing machine; they'll be nice and fluffy afterward!