Our knotted rosaries are made of durable, rot resistant rope.   It's simple and easy to clean just using a wet cloth and warm water. Spot clean the dirty areas by wiping it with the wet cloth. If warm water alone is not getting it clean, add a small amount of mild soap to the warm water before wetting the cleaning cloth. Spot clean as before. When you are finished wipe the rope with clean warm water to remove the soapy residue. We do not recommend submerging the entire length of rosary rope, as many crosses (especially those attached to door and car rosaries) are not created to be water resistant.