CleaningClean your sliding barn door hangars and tracks before adding new lubricants. Apply a degreaser to dissolve old lubricants, and wipe off any residue with a towel. A small brush may be needed to remove debris from the rollers. Change the barn door’s position to ensure that all surfaces are clean.LubricantsSpray a silicone-based lubricant onto the track and rollers to help repel dirt and ensure that all surfaces are lubricated. Apply a lithium grease only to the rollers and slide the barn door along the track to distribute the lubrication. Apply a synthetic lubricant if you live in a extremely hot or cold climate or if the door will see frequent use, as synthetic lubricants generally perform better than petroleum-based products in these conditions.References:Plant Services; Why Synthetic Lubricants Offer Significant Advantages vs. Conventional Oils.Resources:HandymanWire: Slider Barn Door.