Wait, we need to wash our pillow two or three times a year? Considering all the sweat and skin cells it collects (ewww!), the answer is a resounding yes!
Start by squeezing excess air out of the pillow before placing it in the washer. (For top-loading washers, you can launder two pillows at a time. Front-load models can handle one or two pillows.) Use a fragrance-free detergent and, if needed, add 1/2 cup of baking soda to the wash to help remove pillow odors. Run a full cycle using warm water, and do an extra spin cycle to remove excess moisture. Then dry on low using dryer balls. (You can make your own by tying a tennis ball in a white sock.) At the end of the cycle, inhale deeply into the pillow. If it seems to contain moisture, put it through another dryer cycle.