Hi
Oups I forgot to clean filling chamber (fc) during many weeks and now there is black/brown layer inside.
Iso can not clean it and S&B say they have no solution to clean this.
So I try to clean it with orange tool !
I strongly push orange tool, nearly vertical, from top to bottom of the fc, many many times, on a zone like 1 or 2 mm large.
Slowly, the end of orange tool shape changes and it is possible to feel more resistance, more vibrations during rubbing against fc wall; slowly little piece of black/brown layer fall and inox fc begin to appear. The job is easier now, but not faster, just need to enlarge the cleaned zone.
It is a long time to clean all filling chamber, 3 session of 15 minutes here, but it depends of the time waited before to clean it..
During cleaning, grid is always inside heating chamber, to avoid piece of black/brown layer falling in the heater.
For finishing, sanding the filling chamber with orange tool and a piece of sponge (rough face) gives great result. Working with Mighty upside down avoid dust to come inside heater.
If I can advise, trying sponge first might be faster
PS : I broke one fin during strongly pushing with orange tool