Also for bad contacts in old devices (or for the removable battery in my eBike), MG Chemicals conductive grease works wonders. And you can keep everything “orig

Also for bad contacts in old devices (or for the removable battery in my eBike), MG Chemicals conductive grease works wonders. And you can keep everything “original”. For zebra conductors I would try applying a very thin layer of the grease to the copper pads (after cleaning them with a pencil eraser) to assure only conduction along the desired path.