Can the balance Perumal tirtham after distributing to others and Tirukkaaveri tirtham used for Tiruvaradhanam be reused for cooking purposes? What to do with the balance tirtham?

It is not a practice to reuse the balance Perumal tirtham for cooking. We must dispose of the tirtham at a place where we do not step on it; a tree or Tulasi shrub cane watered with the tirtham.