Repositories of body moisture, dead skin and drool, pillows offer irresistible digs to dust mites and fungi. A 2005 medical study of pillows -- said to be the first since 1936 -- found up to 16 species of fungi in a single pillow.
A minute's soak in hydrogen peroxide can kill the toothbrush spores; not so with a pillow.
So what's a side sleeper to do?
The Washington Post offers some advice.