Woke up in the middle of the night, wondering what "WD-40" actually stands for. ๐
It turns out that WD-40 stands for "Water Displacement, 40th formula."
Now you won't need to wake up in the middle of the night and ruminate about it. ๐
https://www.sciencing.com/1829210/what-do-wd-40-letters-numbers-stand-for/