Whether it’s a white or yellow power cord, it’s inevitable that you too will encounter black scuff marks. Such marks occur due to the environment, material degradation, and physical handling. Over time the PVC coating deteriorates.
Keep the power cord clean with a reputable cleaner/degreaser followed by a UV protector to help keep the rubber smooth.
Like many boaters, for many years we have used the Starbrite Power Cord Cleaner/Protector. We recently, began using Boat Cleaner Pro (BCP) followed by Mop & Glo Multi-Surface Floor Protecting Cleaning Polish found at most grocery stores for nearly half the price of BCP wax and more volume.

