When your pruning shears are dull, there’s no need to toss them out. Sharpening your blades and keeping them well maintained is the key to enhancing the tool’s lifespan (and keeping your wallet fat). Remember to: -- Keep your blades sharp. Disassembling the pruning shears is the best way to ensure the file sharpens the entire blade.  -- Remove dirt and muck with warm, soapy water.  -- Remove rust with coarse steel wool.  -- After reassembling the pruners, lubricate the shears with a coat of oil.  -- Wipe your shears and store them in a dry location.