Here is the easiest way to attach points and keep them on wood arrows. Use a broken shaft with the point taper intact, wrap a piece of 120 grit sand paper around the taper and insert it in your point. A couple of twists and you will have bare metal inside the point, no need to use solvents to get any oil out. Tap the sanding dust out of the point.
Mix a small (dime sized) amount of two part, 5 min epoxy, dab a little on your shaft taper and install the point. I mix a small amount because it sets up very quickly and six points at a time is the most I can install before the glue starts to harden.
You can remove an epoxy glued point with heat but it takes a little more heat than hot melt.
Using epoxy, you will never loose another point in a target.