A small amount of the right lubricant keeps bypass pruning shears opening smoothly and helps protect the pivot from rust. Cleaning comes first, because oil applied over sap and grit can turn into an abrasive paste.
Clean before oiling
Close and secure the blades, then brush away soil and plant residue. Wipe sap with a product approved for the tool finish and dry the metal. Wear gloves and keep fingers away from the cutting edge.
Inspect the pivot
Check the bolt, spring, latch, and blade alignment. A loose pivot can make pruning difficult, while a bent or chipped blade should be repaired or replaced rather than forced into alignment.
Apply a light film
Use a small drop of tool-safe oil at the pivot and work the handles several times. Wipe away excess oil so it cannot drip onto plants or collect dust. Do not spray lubricant toward your hands or eyes.
Store the shears dry
Close the blades and engage the lock before placing the tool in a dry rack or case. Wipe the pivot after use in wet weather and sharpen only with a method suited to the blade geometry.