What’s all this about “washing” pillows? I’ve always just washed the pillowcases, just like washing the sheets that you change on the bed (obviously we don’t wash the bed). I’ve kept pillows for years, just like the bed.
I switched to a contoured foam pillow from Bed Bath and Beyond. I think it cost about $25, which is more than I had spent for any 2 pillows previously. It has been well worth it. I’m a side sleeper and the contoured foam gives great neck and head support. I did get a nonallergenic cover to slip over the pillow, not so much for the allergy side as to keep the foam from getting sweaty/oily through a pillowcase. I don’t think the foam is washable.
My husband likes buckwheat pillows. Problem is he gets pretty sweaty, plus takes a good deal of aspirin. Thus, his pillow gets to smelling pretty unpleasant pretty fast.