By the way, an old Indian trick... I guess many guys know this'n but not everybody.

I always dump my points into a cup of acetone to wash the oil and stuff out of them. Then I take a piece of an arrow that I've cut a taper on, wrap 80 grit sandpaper around the taper, and use it to roughen up the inside surface of each point. Then I wash them out in acetone again. THEN I glue them on.