To use your new flannel cotton sheet set, simply put the flat sheet on top of the mattress, then place the fitted sheet over it and tuck it in securely at the corners. Slip the pillowcases over your pillows. For the best experience, make sure your mattress fits the sheet sizes properly. When it comes to care, always wash the sheets in cold water on a gentle cycle. It's important to wash them separately to avoid any damage or color transfer. Never use bleach as it can harm the fabric. After washing, tumble dry on low and take them out of the dryer right away to prevent wrinkles. If you need to iron, use a medium - temperature setting. And if your home washer or dryer is too small, head to a laundromat and use a large - capacity commercial one. With these tips, your sheet set will stay soft and comfortable for a long time.