I've had this pump for about a year now and recently it is starting to act up on me. When I pump up a tire, the pump body gets really warm to the touch. Occasionally it gets really difficult to pump, or sometimes instead of getting difficult to pump, it will occasionally just pump too easily but not produce any results (no pressure builds up). Are pumps supposed to be oiled or have some other maintenance done to it every now and then or is it just time for a new pump? If I remember correctly, this was a sort of expensive pump. I'd like to think that I should get more than one year use out of it. I have been using it for two bikes as a travel pump as well as a home pump.