That's an important piece of advice that you gave me. The urine I wanted to use has been in closed glass bottles for about 1 year. -What should I do now?
- Is this urine useless for the purpose of teeth whitening? - - If yes, can it be used for anything else, or is the ammonia content just too dangerous?
- And last question, what if I open the glass bottles and leave them open for a few days or weeks, will I get a less dangerous ammonia concentration that I can safely use?