In Praise of Ammonia: Ammonia is wonderful for cleaning and cutting grease and is very inexpensive to use. Mix half and half with water in a spray bottle, spray, then watch the ammonia do the work, it's amazing how well it cuts grease so quickly. I haven't found anything yet that it doesn't work on, just DON'T mix ammonia with bleach, EVER!
I soak my old costume jewelry in ammonia for a few seconds or minutes and it comes out shiny bright and clean. Be sure to rinse in clear water after soaking.
To clean my combs and hair brushes, I add a little amonia to hot water and let them soak a little while. Lifts the dirt quickly.
It's also great for cleaning blinds. I put them in the bath tub for soaking. One at the time with the ceiling fan on.