The EZ Pen Oiler makes oiling your machine’s bobbin race easy. Simply pull out the long spout from the bottle, remove the cap and give a squeeze to precisely place a drop of oil in the race. The EZ Pen oiler comes filled with Handi Quilter approved machine oil. Please see your User’s Manual for complete oiling instructions. After each oiling, we recommend you replace the spout cap but do not push spout back into the bottle as this could contaminate the oil in the bottle. If the oil becomes cloudy or discolored it should be discarded.