Using your Casey Cotton Sheet Set is simple. Just put the fitted sheet on your queen - sized 40cm bed, making sure to use the tags to get the right orientation. Then add the flat sheet and your favorite pillowcases. For best results, wash the sheets in cold or warm water with a mild detergent. Avoid using bleach as it can damage the fabric. Tumble dry on low heat to keep the cotton soft. These sheets are durable, but it's still a good idea to check for any signs of wear and tear regularly. If you notice any loose threads, simply trim them with a pair of scissors. With proper care, your sheet set will provide you with many nights of comfortable sleep.