The cone needs to be able to slide up the rope when your trip is over. When I get back in I slide the cone up and use hose spray nozzle to clean my magnet and rope. I then dry it and apply liquid car wax to the magnet and polish it down a bit. If you put them up and dont clean them you will find they tend to rust and corrode. The wax keeps it in shape and will also aid in many of the substances that stick to the magnet when in use to just drop off so you spend much less time cleaning b4 u make your next cast.