First time poster here. I've had a Light Ball Multifloor for about 7 years and recently it started intermittently making a much louder sound than usual. If I turn the brush head off the noise stops, so I'm assuming it's something to do with the motor or the head itself.
Has anyone had this problem before?
Naturally, it's fairly old now, so I don't really want to spend loadsa money trying to fix it, but I'm open to replacing some parts if it might help.
Thanks very much for your time and help!