Replaced the iRobot Roomba front wheel (which kept falling out of its mounting bracket) with a new one and cleaned the whole thing.
Replaced the pressure regulator in the Jura coffee machine that was leaking water and completely cleaned the machine.
Fixed the mechanism of jewelery chain.
Fixed a Yo-Yo.
Swapped the cylinder of the entrance door of the appartment.
Failed in swapping the battery of a Withings Activite Pop.