Kuba cloth is made from raffia, sometimes called grass cloth. It is not recommended kuba cloth be dry cleaned unless it is taken to a high quality cleaner who specializes in antique and fine fabrics.
Before cleaning test a small place using a mild detergent solution on a clean cloth. Very gently rub the cloth to check for any color change etc. Once this is done you may proceed with washing the fabric. Machine washing is not recommended.
Fill a basin with cool water and a mild detergent. Place the fabric in the water and soak for a few minutes then swish in the water a few times. Any scrubbing must be very gentle and from the back side of the fabric. Rinse the fabric in cool water and pat with a clean towel or cloth to remove excess moisture. Lay flat to dry, you can use weights to block the fabric.
If you need to iron the fabric use a pressing cloth and work from the back side. Do not use a hot iron and do not leave the iron in one place. Holding the iron a few inches away from the fabric using the steam feature can also steam the fabric.
Store kuba cloth either rolled, flat, or folded very gently and not stacked.