u003cstrongu003eA:u003c/strongu003e It is not recommended as many lubricants will corrode the hose material, especially if it’s rubber. Moreover, connectors are not movable parts that need lubrication. Once it’s sealed on the air compressor, you may never need to remove it unless you are cleaning the air hose. However, you could use a mild oil-based lubricant to detach the connector if it’s stuck.