After doing my first ever cleaning of my 10 month-old Joule in a 50:50 vinegar bath at 140°F x 15 min, I noticed the motor is making an oscillating sound. I've never really listened to it closely before, so I don't know if this predates the vinegar bath or not.
I did remove the propeller and do not see any crude or anything abnormal inside.
Should I be concerned?
Video with sound is posted on Cook with Joule Facebook page: