A 2022 study published in the Journal of Food Protection found that people often spread food bacteria to the spice shakers they use as they cook. To prevent cross-contamination, wash your hands before cooking and after handling raw meat. And clean the spice containers after use.

Bacteria from something else you touched in the kitchen can be transferred to the microwave controls, says Don Schaffner, chair of the Rutgers University Department of Food Science. Wipe the pad with mild soap and water. Avoid spraying cleaner on the panel or using disinfecting wipes.

Bacteria can grow in the pipes and then shoot out when you turn on the jets. “These microscopic bacteria become an aerosol that can get into your lungs,” says Rita B. Moyes, a retired Texas A&M University microbiologist. Purchase a special sanitizing cleaner for whirlpools and jetted tubs.

You’d think this would be one of the cleanest rooms in your house, but warm and moist environments are hot spots for bacteria and mold. Especially in a basement, run a fan to keep air circulating, says Patric Richardson, author of the book Laundry Love. Or use a dehumidifier. —Sheryl Jean