Robbie the Roomba, Zombie.
My Roomba, died after a year, he would trundle out then after 4 mins, tell me that his brushes needed cleaning.
I dismantled him two weeks ago, took out a huge amount of long hair from his gear box, and around the motor spindle and now he's back to trying to hump the guitar stand. and hiding under the sofa with a discarded sock. Happy times.