Unwashed Bedding
“The human body naturally discharges sweat, saliva, mucus, skin cells and a number of other excrements,” says Matthew Ross, the co-owner and COO of The Slumber Yard, a mattress review site. “Combined, all these factors make your bed and sheets a cesspool for germs and microscopic life, which [then] make your bed an ideal environment for pests like mites, ants, bed bugs, and spiders.”
Ross suggests washing your bedding weekly and your mattress at least once every two to three months.