I was preheating my oven with the racks in the wrong spots for who knows how long
Had a batch of chocolate chip cookies come out with burnt bottoms and raw tops last Tuesday, and my buddy who works at a bakery in Boise asked where my racks were sitting. Turns out I had both racks shoved in the bottom third for 2 years, and moving them to the middle fixed everything on the first try. Did anyone else go way too long without figuring out the rack thing, or was that just me?