I've heard about using Formula #409 before and how good it works, but I've never tried it.
I've also heardabout Brake Kleen, andusing regular GoJo handcleanerthat's soldcheap atWalmart.
GoJo was originally designed to remove carbon based tire black from the hands ofrubber/tire factory workers, anda fewguys say that it makes a good patch lube too.
I've never tried GoJo but it probably has some good cleaning properties.
Ibelieved thatFormula #409 would work as good as claimed becausesomeonehad sostronglyrecommended it.
And becauseyou've justconfirmed it, it's more likely that I would make an effort totry it sometime, especially on stubborn fouling like around the drum where fouling gets cakedon.Plus I probably already have some in the house.