Although his performance has been somewhat improved since his last inspection and routine cleaning, Roomba still hasn’t been himself lately. Empathetic, I found him this morning in a lonely corner, repeatedly banging his head.
With screwdriver and seam ripper in hand, I performed a colonoscopy. Having only crude tools and no sedatives to offer, I wasn’t sure I was qualified; however, the procedure was successful. I found and removed the likely source of his abnormal behavior and weakness: a massive and very compact hairball hidden under his front wheel.
A warning to fellow Roomba enthusiasts: Front wheel hairballs must be treated immediately or they may cause Roomba to stop feeding and, ultimately, die. (It’s “hou’-zing,” darn it.)
He seemed his old self immediately afterwards — still minus his side brushes, of course. 😕
Fanflower's Weblog 
Hopefully, your overworked janitor, Mr. Roomba, is listed as a dependant and covered in your health insurance! His being in ‘Hairball’ territory constantly, does call for emergency treatment on a regular basis! 😉