I'm trying to make a basic lard/lye soap. The recipe I've tried twice is 2 1/2 liters water, 1 can of lye (whatever that is, wish I had ounces) and 5 1/2 lbs of lard. I let them both settle to between 85-95 degrees and mix them both till smooth and streaking. ...days later, it's still just like greasy lard. I make it in a ceramic-coated pot with a plastic spoon. Can someone please tell me what I might be doing wrong?