#726:Squeaky and Rusty

Where’s your WD-40?When a door hinge squeaks or a bike chain becomes rusty, what do you spray on it? Probably WD-40. The spray lubricant works so well that around 80% of American households have a can somewhere in their garage. But WD-40 wasn’t easy to create. Engineers developed dozens of mixtures until formula number 40 proved just right. As parents, WD-40 helps us remember that good things take time to develop. It’s easy to grow frustrated when our sons don’t mature as quickly as we’d like...