Wash shells, wipe down liners, spray with disinfectant, and store in a clean, dry (but not too dry) place away from direct sunlight. A coat of WD-40 or mineral oil keeps buckles lubricated and rust-free (but wipe any residue off the plastic shell). If your liners are all- or partly leather, reconditioner helps keep them supple and clean. If you use duct tape to keep snow out of the toe-box, replace it. Buckle loosely and store in a cool, dry place away from direct sunlight.