<p>It's not complex - your bearings need lube!<br>A single drop into each bearing can lubricate the inner ball bearings, allowing them to spin freely without overheating.</p> <p>Use this after cleaning and drying your bearings, or use this to make older bearings spin a bit nicer.</p> <p>This isn't a cleaning agent, just a lubricant. A bottle this size is tiny but mighty, using a small amount each time will allow it to last for a long time.</p>