Dairy,

In the past I have taken them off with a flat screw driver and a pair of pliers. I used the screw driver to carefully spread the nock then the pliers to get it off. You must take it easy though or you will cut your serving. Or, you could just go to a local pro shop and they will probably take it off at no charge.

I also tie my own and it's been years since I removed a brass nock the "Primitive Pete" way.