given all the controversy about Mousekeeping using windex to clean the glasses in the rooms, I am wondering if the problem is whatever they use to clean the pots just tastes bad--last time we stayed at GCH the pot the first morning was undrinkable--I didn't even bother the second day but the person I was with did and said it was ok. So that led me to believe that in-between guests they clean those pots with some chemical that leaves behind an aftertaste.
Or we just always seem to arrive on Sundays and they chlorinate the water that day. Just stayed in the DLH and the water tasted bad there too (and the one and only time I used the coffemaker it was awful). Luckily I discovered they have "free" coffee in the lobby of each tower at 6:30 so I went down there.