Fault finding Why does my homebrew taste bad? Paul and Max sample their first all-grain homebrew. Paul: Our first all-grain beer! Cheers! Paul: Brrr . Max spits out: Yuck. Paul: Maybe we were too sloppy with some of these temperature readings? Paul: Did we leave the malt in the water for too long? Paul: Should we have filtered or treated the water? Max: Nonsense! Tomorrow we'll go complain! That homebrew store must have sold us crappy malt!