That's what they end up doing, in the article. The ferret never did the full 4-mile trek around the cyclotron from my skimming of the article, and only cleaned

That's what they end up doing, in the article. The ferret never did the full 4-mile trek around the cyclotron from my skimming of the article, and only cleaned short (well, 300-foot) sections of the 2nd accelerator that was under construction.