Hi
As with all chemicals, let it do it's work.
This means you have to leave it on enough time to do it's work.
If I am cleaning an EOT, i will spray on either over & hob and leave for about an hour, only warm on a gentle heat, this will loosen the carbon and make it easier to clean.
I usually use a scourer, but don't rub really hard otherwise you will damage what you are working on and most PL ins don't cover for this.
Regards
Martin
