Everybody needs a tube of this adhesive to seal up leaks, glue down vinyl frames, etc.  It is so versatile you will find plenty of uses for it.  The little nozzle to do a bead will be a one-time deal since once the silicon is in the nozzle it will seal up.  You could clean it out with a coat hangar or small screw driver but not difference with other nozzles.  At least with this one you can remove it and still use the tube.