My own experience and discussions with other premium dental handpiece parts specialists www.qualitydentalservices.com have led me to conclude that there are five fundamental procedures involved in maintaining a high-speed handpiece. There are two that we have already discussed. Decide on a lubricant, which brings us to our third point. To get to the lubrication, the spray's propellant must first evaporate. A syringe or oil pen is what I employ. As the oil is under your complete control, I think this is the preferable option.