You could use a rubber mallet. Or simply follow the good advice given above: Mash a little longer or accept the loss in efficiency. Sorry, Crunk, I wouldn't wet condition over night - too much chance of the lactobacillus on the husks having their way with the grain....
That actually helps with mash pH. A few ounces of water isn't enough to make much of a difference, though. Adding that to crushed grain will probably just oxidize it.I wouldn't wet condition over night - too much chance of the lactobacillus on the husks having their way with the grain