Using your new cotton flannel sheet set is easy. First, put the fitted sheet on your mattress, making sure it fits snugly. Then, lay the flat sheet on top. Place your pillowcases on your pillows. For a great look, you can tuck the flat sheet under the edges of the bed. When it's time to wash the sheets, just toss them in the washing machine. Use a gentle cycle and mild detergent. Avoid using bleach as it can damage the fabric. After washing, tumble dry on a low - heat setting. This will help keep the flannel soft and fluffy. Store your sheet set in a cool, dry place when not in use to keep it in good condition.