Here’s the real advice from a friend who has cried over a leaking KitchenAid: Don’t run it for 30 minutes straight making bread dough. That’s how you cook the grease out. Give it breaks. Let it cool down. It’s a mixer, not a marathon runner.
Also, stop using the "stir" setting to mix concrete-like cookie dough. Use the lower speeds for heavy stuff. Speed 2 is your best friend. Speed 10 is for whipping cream and light batters only. Seriously. Your manual isn’t just a doorstop.