I recently broke down and bought a "proper" incense holder, a little cup filled with sand that you plop the upright lit stick into. This replaced my "improper" incense holder that was a curved piece of wood that held the stick at a horizontal angle with no sand. OK, my dumb question is this: what am I to do with the ashes that fall into the sand? Should I leave them there? It looks like used cat litter if I do. Should I somehow fish those ash sticks out of the sand? Like a litter box. Or should I just mix it up with the sand? Thus hiding the "cat" litter.