Well, the problem with detecting neutrinos is just what we said: They generally don't interact with other matter. One exception to that is water -- when a neutrino smacks into a water molecule, it gives off a tiny flash of light. In fact, the light is so tiny that, in order to detect it, you need a chamber capable of holding 50,000 tons of purified water and lined with myriad photomultiplier tubes. The result looks like a stage lighting system designed by Spinal Tap and assembled by Stanley Kubrick.
Univ. of Tokyo
It's so friggin' bright that it will make you see space babies.
That's not the only problem, however. Since the effects researchers are trying to observe are so very infinitesimal, they're often overpowered by cosmic rays and other such interference. To combat this, the detector is located more than a half-mile below ground. That didn't protect it from itself, though: Back in 2001, the pressure from all of that water caused one of the photomultiplier tubes to implode, setting off the most expensive chain reaction this side of the Death Star.
Super-Kamiokande was soon patched up, and, although it proved the existence of neutrino mass way back in 1998, it's still being used to research the history and evolution of the universe to this day. Or, all of this neutrino nonsense is an elaborate front, and this thing is really used to open a portal to some hell dimension. Guess we'll find out eventually.