For several months, I noticed that my MacBook Pro made weird hissing and clicking sounds in the morning. That’s bad, I thought, and I checked to be sure my backups were OK.

But other than that, I didn’t think about it. The sounds only lasted a second or two and only happened once or twice in the morning.

Recently, I realized the MacBook Pro wasn’t making the noise. It was my insulated coffee carafe, which rests next to the MBP when I’m having coffee at my desk in the morning.