Using these Casey Cotton Fitted Sheets is a breeze. Just place the sheet on your half - queen 50cm bed and use the tags to make sure it's correctly positioned. For washing, you can use a regular cycle in your washing machine. Use a mild detergent to keep the fabric in good condition. Avoid using bleach as it may damage the cotton. After washing, tumble dry on a low - heat setting. These sheets are designed to be durable, but it's still a good idea to check the seams occasionally. If you notice any loose threads, you can easily sew them up to keep the sheet in top shape.