When i cleaned cookers , i used to paste one up and take all the bits home and then clean one off which i pasted up the day before.
So basically i had two on the go at one time,
The franchise ovenu says they can clean a cooker in 3 hours with a non caustic chemical , i used a chemical of ph14 (deadly) i tried to find what there chemical was but it was a safely guarded secret i asked a operator about the chemical they arent told what it is and they dont have or need a cossh sheet which i found hard to believe.
I also contact the chemical research centre porton down and asked the boffins what was the best chemical to use they instructed me to contact N.A.S.A ( true this is not bullsh --

) i eventually had a reply that they had invented a water pressure washer which fired tiny molecules of water at the carbon and broked it down so it could be removed they sent the manufacture my details They forwarded a letter regarding this machine and the cost of £140,000 i carried on with my brillo

Paul