infections are caused by germs. microorganisms like viruses or bacteria. ammonia does not have germs but it can cause inflammation in the nasal membranes and sinuses. i suspect you are experiencing a chemical inflammation not an infection.
could strong ammonia spray cleaner cause sinus infection. i was using a spray cleaner i made from a mixture of ammonia & water. later my sinuses were dripping and when i put my head down or lay down i smell this strong odor. i have been using simply saline and it helps for a while but comes back. my sinuses are not congested or puffy and i do not have a fever.