Using these Casey Cotton Sheet Sets is a breeze. Just put the fitted sheet on your Split King Bed 40cm, using the tags to make sure it's in the right position. Then add the flat sheet and pillowcases. When it comes to washing, you can use your regular washing machine on a gentle cycle with mild detergent. Avoid using bleach as it can damage the fabric. After washing, tumble dry on a low - heat setting to keep the sheets soft and fluffy. These sheets are durable, but try not to over - stretch them when making the bed or folding them. With proper care, they'll last you a long time and keep providing you with a comfortable sleep experience.