Yesterday was one of my days off for the month, so I decided to run some errands. My sewing machine had not been working right so I decided to take it across town to a repair shop, 25 minutes away.
I take it in to drop off. The repairman took one look at it, said "you have the needle in backwards", turned the needle around, and proceeded to show me that my machine worked perfectly. Cue me feeling like an idiot.
These are the trials of a self-taught crafter. At least the repair was free.