Sterling Wicked Good Rope Wash Fall 2009 The Wicked Good Rope Wash by Sterling makes old ropes look and feel like new One of the most commonly asked questions is in.How do I wash my rope?in. Sterling solves the problem with its easy, simple to use, safe, biodegradable rope wash. Available in pre-packaged 1-oz. packets with easy to follow wash instructions. One packet will wash one rope.