WD-40 didn’t just listen to customers — they solved their own frustration. For decades, the biggest problem with WD-40 wasn’t what was inside the can. It was that darned little red straw. Everyone lost it. I couldn’t even tell you how many I have lost. They fell off, rolled under tool benches, got taped to the side of something else, or vanished completely. The company’s own engineers were just as annoyed as the rest of us. So they fixed it. They built the Smart Straw — a permanently...