This is NOT a FOOD RECIPE. It is a household cleaner that works great on grease and soap scum. Works on all surfaces, but when using on varnished surfaces, wipe it off immediately after applying. Please be careful with it and label it so that no one will ingest it. Read more . REPEAT...this is NOT a FOOD recipe!! People are telling me that for some reason ammonia makes there male cats spray. I don't understand this as I have always had male cats and it has never made them spray. So any way use with caution.