Make sure the tip is aligned with the rest of the helix so that it is not boring its way down while the rest of the helix is tearing a wider hole. If something goes wrong, stop. Do not force the issue. If only half the cork is coming out, screw the helix in deeper. If it is pulling out the center only, remove the corkscrew and drill another hole where you can start over again, or screw the helix down the side and try to pull it from there.
Many states permit corkscrews to be sold in wine stores.