Regular care : Vacuum your rug once or twice a month. For spots and accidents you can clean it using a damp white towel with cold water and laundry detergent, however make sure that your rug does not stay wet or humid.
Deep cleaning: Have it cleaned by a professional rug cleaner.
Once in a while let your rug out in the sun for a bit. Don’t store it in a bag or in a humid place.