Corrected entry: In 3-6 "Band Candy", Buffy finds a monster and the babies that had been kidnapped in the sewers, simply, it would seem, by going underground, as if Sunnydale's sewer network was small enough for such a feat. However in this episode, when Buffy and Xander are looking for the 3 priests in the episode “Amends”, they get information from Willy the snitch that they may live underground. Xander says "We know 'underground', that's a start," to which Buffy disdainfully replies: "Sure! In a town with 14 million square miles of sewer". Even assuming she's speaking figuratively, there's no reason it's easy to find someone the first time but not the second.
AnthonyA
17th Feb 2014
Correction: In the first instance there are missing babies and a monster that must be stopped which she knows to be in the sewers. She had no choice but to go down there.She merely got lucky and stumbled upon them relatively quickly. In the second instance there is only the suggestion that their targets MIGHT be in the sewers. Naturally, Buffy is much more hesitant to try her luck a second time with what may turn out to be a pointless effort anyway.
Phixius ★