According to Laundry Experts, You Should Be Washing Your Sheets at Least Once a Week

may also want to use a washable pet blanket to protect the bedding.
Do clean sheets help with allergies?

Regular washing can help remove dust mite allergens and other particles from bedding. However, sheets are only one part of allergy management.

Mattress and pillow encasements, regular vacuuming, and reducing bedroom dust may also help. People with significant allergies should follow their healthcare professional’s advice.
How often should I wash my mattress protector?

Many mattress protectors can be washed about once a month, but the ideal schedule depends on use and the manufacturer’s instructions.

Wash it sooner if there are spills,