Originally Posted by ArcLight
Next time, instead of adding a gallon of hot water at 20 minutes, soak the grain bag in 2 gallons of hot water, and then add that.
You will be surprised how much additional sugar you will capture and how much higher your OG will be.
This is especially true with thicker mashes (higher grain bills)
This worked out at 85%, that's as high as I want it to go! It wasn't hot water it was boiling water to replace what has already been boiled off, since there is only so much room in the kettle.