Grease your lock?: Why oil is the worst mistake for sticky doors

Using liquid oils to fix a sticking door lock is a common mistake that often worsens the problem. While oil may provide temporary relief, it attracts dust and debris, eventually creating a sticky residue inside the cylinder that can block the mechanism entirely. To reduce friction in a lock without introducing contaminants, experts recommend using graphite as a dry lubricant. A simple pencil lead serves this purpose effectively. However, according to residential maintenance specialist Ilya Kondratyev, this method is designed for mechanical friction and will not resolve issues caused by a structural misalignment of the door. Steps Prepare the lubricant. Use the graphite from a standard pencil lead to create a dry lubricating agent. Apply to the lock. Introduce the graphite into the lock cylinder to reduce friction between moving parts. Beyond hardware maintenance, applying basic material physics can prevent premature wear of household items. For example, avoiding clothespins on the shoulder area of shirts during drying prevents the fabric from stretching under its own weight; instead, pinning the garment by the bottom edge preserves its shape.