1. Hoover Regularly

This will remove any dirt from the rug and keep it looking fresh and help protect against moths. If your hoover comes with a rug attachement ideally use this. Occasionally hoovering the back of the rug can also protect against moths.
2. Treat for Moths

All rugs are treated for 12 months after you purchase them after the initial year I would advise that you treat as per the moth preventions instructions. The rugs are backed with latex which is a moth deterant.  
3. Clean When Needed

DO NOT PUT IN WASHING MACHINE If you have an area that needs to be spot cleaning use warm water and a mild dish washing liquid or alternativley 1:2 vinegar and water mix. Be gental while cleaning and use a blotting technique rather than scrubbing. If it is excessively dirty consult a professional.