The blades of your new clipper should be oiled every few haircuts. Simply place a few drops of Wahl Clipper Oil on the teeth of the blades. Use only the Wahl Clipper Oil included in the pack. Due to the high speed of your Wahl clipper, the correct type of oil must be used. Do not use hair oil, grease or any oil mixed with kerosene or any solvent, as the solvent will evaporate and leave the thick oil, slowing down the blades. Wahl Clipper Oil is a very thin, natural oil which will not evaporate and will not slow down the blades.