Glad the sneakers balls are working for you, mine have been in for over a week and still stink! Ive used gloves one time and about gagged the whole workout smelling the bleeping things! I have them laying on the floor across the room and can smell them especially when I'm down on the floor. I might just end up pitching the damn thing!
I don't know if this will work but a couple years ago our neighbor got into the furniture reselling business and he told us that to get odors out of the furniture fabric they cut apples in half or quarters and placed them in a huge plastic bag that is wrapped around the piece of furniture for several days. (For furniture it was sometimes a week or more if the odors were strong.). Maybe that would work? Otherwise I would call the company.