The few kits I have made come with both cans of extract, dme, and/or grains. The directions say to bring the water to boiling, then steep grains for 30 minutes. From what I have read, this seems pointless. At this temp (200 degrees plus), it doesn't seem to be efficient. Wouldn't it be best to steep the grains at 150-160 degrees for a hour? Just wondering why all the kits say to do it like this.