Also just want too let you know and I am sure you know this already! Do not mix anything in with ammonia not even soap! Buy the ammonia soap brand or go too wal-mart and get the lemon looking Ammonia they sell it is got soap mixed in with it! that is what I use!
Just telling you this because I knew a guy who I thought would know not too mix anything in with ammonia well he tried mixing ammonia with some soap that I think may have had some sort of bleach in it or something and well he had to pay a big hospital bill so always be careful with ammonia! it really is harmless you can splash it on, inhale just the ammonia and be okay but boy u mix it with almost anything you turn it into a gas bomb.