Using these Casey Cotton Flat Sheets is a breeze. Just lay them flat on your king - size bed. For the best comfort, make sure the sheet is smooth and wrinkle - free. When it comes to washing, use a gentle cycle with cold or warm water and a mild detergent. Avoid using bleach as it can damage the cotton. After washing, tumble dry on low heat or air dry. This will help maintain the softness and durability of the sheets. Store them in a cool, dry place to keep them fresh and ready for your next restful night.