So in "Mikey Gets Shellacne", the Turtles must aquire a mollecular centrifuge in order to cure michaelangelo of his disgusting acne. But, does anyone remember in "Parasitica" that Donnie already has a centrifuge, that's how mikey cured all of his brothers from the wasp's virus.
So why did they have to go back to get another centrifuge!? Or maybe they lost it, or perhaps Mikey broke it? What are your thoughts?