1 Gallon WD-40 | $14 | Amazon
Graphic: Shep McAllister
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Update: Sold out

Everyone should own some WD-40. It’s obviously great for fixing squeaky hinges, but it has a ton of surprising uses that have nothing to do with lubrication. This one-gallon can is just $14 on Amazon today, which is as cheap as it’s ever been, so add it to your cart faster than greased lightning.