Got a lovely message/pictures from Joanne with a question this morning, read on for the answer!
"This is what I started with and have followed the instructions with you cleaning kit. This is what I finished with, I'm very pleased with the results but I can't get a high gloss in some areas, do you think this is damage from other cleaning products or do I need to clean again?"
Sadly the 'matte' effect is wear rather than dirt - it's where the top glaze has been rubbed off over time. It's pretty normal - try to think of it as part of your cookers character or consider a Blake & Bull re-enamelling!