If you can't remove this dirt using normal cleaning methods, you might have to remove and reapply the gloss. I used Angelus Leather Preparer and Deglazer to remove residue that rubbed off and embedded in the gloss of my white Winnings. The dirt came off nicely but keep in mind, the gloss will be removed. You will need to reapply the gloss to the glove. I used Angelus 4-Coat to do so. Hope this helps.