I use a BG Alto Sax Swab cloth, which is an absorbent cloth attached to a ribbon, weighted at the end. I roll the cloth up to pull it into the neck tube and this dries it completely. I pull this unfolded cloth through the body until all the drops of condensation have been removed, usually 3-5 times. I’ve discovered the top side key and palm key valves are still very damp even after doing this. So I insert a 1″ strip of sugar paper under the valves to absorb the water. I have to move the paper over two or three times to dry out these top four valves completely before removing it. I leave the sax to dry out for an additional 10-15 minutes before putting it away in it’s case.