Beal Rope Brush
The Beal Rope Brush is an easy-to-use, effective method by which to clean dirty ropes. Twist the rope around the brush then simply run it over the rope’s entire length while holding it firmly under water. Replace water and repeat until the water remains clear.
Features

Full Features List
• Maintaining a clean rope will not only make it run smoother through your belay and gear, but will also increase its lifespan
• Effective and inexpensive way to clean ropes
Cleaned 2 of my ropes with this little thingy. Works like a charm. Nice workout for your arm/shoulder too depending on the length and thickness of your rope!