Only for cleaning them out mate - its amazing how much grot accumulates when these things are left ticking over......the wifey next door swears by it. I swear at it.....
The damper flap, which directs hot gases under the oven box, works very well but needs regular cleaning too.
John
Thanks for your comments Burnerman, but I think you are describing the Superstar 80. which I am pensioning off. The new Donard is twin burner and does'n't have the baffles or damper.