Thanks for the tips and advice. I've been cleaning my bottles in the dishwasher without soap and have also been using the heat dry cycle to sanitize them, but maybe that's not been doing the job. I use Starsan for all of my other sanitizing, maybe I'll have to start using it for my bottles...

I've just recently started brewing beer and have done about four 5 gallon batches. The beer turns out good other than it seems a little flat, more like it just doesn't have much of a head on it when I pour it into a glass. There is some foam, but it seems like a have to try and create the head...