Mild soap and cool to lukewarm water. A bathtub or large pail works well to allow complete submersion. Place rope in soapy water and agitate to remove dirt particles. Rinse well in several baths of clean water. It is extremely important to remove all soap residue. Leftover soap residue will attract dirt like a magnet. After rinsing, loosely coil your rope and air dry in the shade. Never use cleaners with bleach or bleach substitutes. Remember- if a soap is harmful to your skin then it is harmful to your rope!