I am also cleaning 8 White 100% nylon rugs, these have been made to order. The rugs are used in Weddings. The rugs are challenging to clean as they are some times laid on grass or dirt surface, the backing will absorb some of the surface, when cleaning it will bleed into the fibre. Both sides are cleaned to produce a clean result. These rugs can be put into a rug bath to get the best result.