Using these Casey Cotton Fitted Sheets is a breeze. Just place the sheet on your single 50cm bed, making sure the tags are in the right position. Then tuck the corners under the mattress to keep it in place. When it comes to washing, you can use a regular cycle in your washing machine. Use a gentle detergent to keep the fabric soft and long - lasting. Avoid using bleach as it can damage the cotton. After washing, tumble dry on a low - heat setting or hang them to dry. These sheets are designed to be durable, but it's still a good idea to check for any loose threads or signs of wear after a few washes. If you notice any issues, you can mend them easily to keep your sheets in top condition.