TSP – or Trisodium Phosphate – can be found at most hardware stores. It is a white powder that is a MUST for your household cleaning! Simply add some to a bucket of warm water, dip in a sponge and let the magic begin. TSP is often used to clean down walls before painting. It is particularly good for kitchen cleaning when grease is a factor.
Before you use TSP, spot check it in an area that no one will see. It has been known to dull certain metals and stain woods. But once you have determined it will not harm your surface, watch the dirt melt away!