Dave, It's calcium. At your age you need all the calcium you can get.
OK... mild acid, maybe even vinegar, should reduce the little discs to goop. I would start with a $3 gallon of vinigar mixed with dish soap so it sticks a bit, then go from there. Then you can blend with ice, ensure, geritol and rum. Like a calcium colada. Sorry. I just can't help myself. Rob
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