That familiar blue-and-yellow can sitting in the garage or under the kitchen sink often feels like a silent problem-solver, ready whenever something squeaks, sticks, or refuses to move. WD-40 has earned its place in homes around the world through reliability alone, yet few people stop to think about how versatile it truly is—or where it came from. What many see as just another household spray actually has a practical backstory and a purpose that goes far beyond quick fixes, revealing why it remains useful decades after its creation. The story begins in the early 1950s, when a small team at...
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