Will this have any negative affect on someone that has had thyroid cancer and their entire thyroid removed? It says you fill the bottle up with water and let it soak for four hours and then can use it as a disinfectant. If you leave the water in a lot longer I am assuming it will dissolve all the crystals with enough time so if you poured the water out of the bottle after four hours and stored it in something like a transfer tube will it remain an effective disinfectant or will it go bad? They say the crystals have an indefinite shelf life so I am wondering if the treated base solution does also or if it will go bad. In other words can you prep some solution and then actually use it at a later time so you don't have to wait four hours to get a good set of solution. Does this leave a bad aftertaste and if you use this along with a water filter will it remove the after taste if that is a problem?