PG - Most of those little pops and clicks (especially the ones that are regularly timed) are coming from Don's "Booper", a little noise-making device constructed by David Wills (The Weatherman). They're supposed to be there, it's part of the noise that thing makes.
No doubt there are other "distracting" noises too, but that's sort of the way we like it, gives it a certain "feel" I guess.
By the way, a lot of that was constructed entirely ad hoc, we put together a lot of this material live, in the middle of the radio show. Sometimes it works, sometimes it doesn't. But when you're improvising with about 20 different pieces of electronics running through several different mixers etc etc, you're bound to get some uncleanliness there. But, like I said, that's the way we like it!
I do produce much more polished stuff in my little studio though.
If you liked that tune, here's another one in the same vein:
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