Science says that Jupiter's precipitation includes helium-neon rain.

So, that explains the depletion of helium, but what does that have to do with neon? At that crucial elevation, 10,000 to 13,000 kilometers below the cloud tops, neon and helium behave very similarly. Neither dissolves in the metallic hydrogen, but neon is perfectly happy to dissolve into the helium droplets. So when those helium droplets fall, they take the dissolved neon with them. Eventually, the falling helium droplets reach a temperature and pressure where they, too, go through a phase transition and become metallic, at which point the helium and hydrogen happily mix.

Outer space must look like a 1970s record cover.