Zep's Purple Industrial cleaner will get your tire brushes clean. However, its powerful (truly industrial) and not health friendly, so be careful using it. Your body will absorb it through your skin, and vapor through your eyes and lungs.
I wish it was a safe cleaner because it is the best tire cleaner I have every used. I only use it when I get a car that looks like they have been applying used motor oil as a tire dressing.
I've got my TS tire brush clean with it many times after a tire cleaning turned the white bristles nearly black.
I wish it was a safe cleaner because it is the best tire cleaner I have every used. I only use it when I get a car that looks like they have been applying used motor oil as a tire dressing.
I've got my TS tire brush clean with it many times after a tire cleaning turned the white bristles nearly black.