Only good if you're gonna sell the car to make it look pretty. It'll get rid of some essential oils and grease. Just clean with with designed for engine bay cleaning products.
Irrespective of he's stinking rich or not, he's entertaining to many and he makes the show complete. Those three have got a great on screen slapstick persona. Two people have mentioned his wealth. Does it matter?
Andy... Where did you get the switch from? Been looking for one that will fit. Need it for my exhaust valve. Had a hole there for the last couple of years.