B15M has brought up an alternate, if not somewhat more expensive alternative. Instead of cleaning and relubricating, FLUSH the contaminants out by oiling before and after play. One point that I woulkd like to make, all of you that oil on demand are just fooling yourselves. By the time the valve tells you that the lubrication is inadequate, you have already been grinding away for a good while. The sludge left after the lubricating part of the oil has evaporated can keep the valve from "sticking". That does not mean that there is no wear. Oil regularly!