Using your new cotton flannel sheet set is a piece of cake. First, put the fitted sheet on your mattress, making sure it fits snugly in the corners. Then, lay the flat sheet over the top, smoothing out any wrinkles. Slip your pillows into the pillowcases. For a cozier look, you can fold the flat sheet down at the top. When it comes to washing, just toss the sheets in the washing machine on a gentle cycle with cold or warm water. Avoid using bleach as it might damage the fabric. After washing, tumble dry on low heat. This will keep the flannel soft and fluffy. Also, don't overstuff the washing machine or dryer to ensure thorough cleaning and drying. With proper care, your sheet set will stay in great condition for a long time.