Ammonia can be removed easily with any acid cleaner or weak acid, such as acetic or citric.
Acetic acid has a strong odor, but citric is fairly corrosive.
Use mild solutions. You can also leave a pail of weak acid in the room for an extended time to clear the ammonia, which outgasses. There are also NH3 electrodes for pH meters, but they are costly and complex to use. It can also be removed with acid cleaners. Or protein scum, which again is susceptible to acid cleaners.