When brewing the tea portion i'm only getting maybe 3 or 4 ounces in the cup at most. I just got my machine, is there something I need to adjust so that it brews more? I know I can manually hold down the button and more water comes through, but I thought the bar code was supposed to know the standard amount for each drink and this seems extremely low. Does anyone know how to adjust this or is my machine broken? I think i have the T20.