Most homeowners reach for the can of WD-40 already sitting on the garage shelf the first time a door starts squeaking. It's tempting: it's already there, it sprays into every gap, and the smell makes it feel like you did something. The problem is that WD-40 is a water-displacer and light cleaner, not a lubricant. It flashes off quickly, leaves hinges and rollers dry within days, and actually attracts dust and grit that grinds down moving parts faster. In Southside's humidity, where moisture gets into every hinge and bracket, that dry-fast spray does almost nothing to protect metal from swelling, sticking, or surface rust after a stretch of afternoon downpours.