I'm not sure if this has been clarified, but I only saw the interview with Jasmine saying teams wanted her to scrub tires for them, and she replied "we're here to go rounds", not scrub tires. I didn't hear if anybody called her team "tire wipers", which is different. Many top tier fuel teams use part time teams or Top Alky teams to scrub (break in) new tires. We've done it with my A/FC.