Using your Sferra Giotto King Fitted Sheet is easy. Just put it on your king - sized bed. When it's time to clean, machine wash it in warm water on a gentle cycle. Don't use bleach as it can weaken the fabric and cause yellowing. Also, avoid using fabric softener. Wash dark colors separately to prevent color bleeding. Tumble dry on low heat and take it out while it's still damp. To bring back its luster and sheen, iron it on the 'cotton' setting.