Taken from a Sisal website.
Cleaning:
If possible, rotate your rug every six months, to change the traffic pattern on the surface of rug.
Should your floor coverings require a total cleaning, it is important to insure that a cleaning, hot water extraction or wet shampooing should NOT be used. These methods can cause shrinkage and staining of natural fibers. For an overall cleaning it is best to consult a professional who has experience with Natural Fiber Floorcovering.
Professional dry extraction methods of cleaning are recommended.
With proper maintenance and care your Natural Floor Coverings will remain beautiful and functional for years. However, natural fibers may not be the best choice for every condition. Also, the responsibility for cleaning and maintaining lies with those who perform the task. These cleaning and maintenance guidelines provide a practical guideline to keeping the floor covering looking its best. No warranty is expressed or implied.
Regards
Robert Olifent