Caig Deoxit G50W Wipes 

DeoxIT Gold G-Series, is a unique conditioning solution that improves conductivity and provides long-lasting protection on gold, base metals and other precious metal contacts and connections (gold, silver, rhodium, copper, bronze, nickel, etc.).
Cotton Wipes, 1.75 x 1.75″, provides NO flushing action, applies 100% DeoxIT® Gold.
Use: When contact and connector are easily accessible. Provides wiping action – wipe with the grain recommended. No flushing action.
Notes: Use when over spray is an issue on materials. Formulation safe on plastics. Recommend wiping off excess, leaving a thin layer. After application, if you notice a green or black discoloration (sometimes over time), this indicates it is doing its job (dissolving oxidation) and improving the connection. Wipe off and re-apply DeoxIT®.