The Angel who raised me and took care of the house, used to put Ammonia in the laundry. She would add it to loads that couldn't tolerate Clorox. What exactly does Ammonia do in the wash?
I swear by the laundry product called "Soilove" for spot and stain removal. It will even work on stains that have already gone through washing and drying that for whatever reason were not treated the first time around. There is a definite amonia smell to this product so I am sure there is a connection between amonia and cleaner laundry.
My Grandmother use to put a cap full of Pine-Sol in the laundry at times. Not sure what it did. The sheets always smelled good after she line dried them.