"Tumble dry the pillows on low heat, fluffing and turning them often*. When drying natural filled pillows, it is important to shake them occasionally to redistribute the feathers. Place them on a drying rack so they are flat and have good air circulation to aid drying.
"Don’t dry clean because the chemicals are difficult to remove and you certainly don’t want to be breathing in toxic fumes during the night. In the hotter months or if you get particularly hot at night, you might want to wash them slightly more frequently."
*If you don't have a tumble dryer, then most launderettes offer a pillow cleaning service. And if you don't fancy the launderette, here are some helpful tips about drying pillows on a drying rack.