Originally Posted by Kaiser
Did you notice a green vegetable smell of your wort or beer. This is usually caused by DMS, which needs to be driven out out the wort during boiling.
As the others said, boil w/o a lid on and account for the evaporation loss at the beginning or the end of the boil.
What Kaiser said!
Wet cardboard flavor, especially in extract/mini-mash is enhanced with the lid on..
Boiling W/O the lid,
late extract adds,
& mini-mash really improved my beer.