Ordinary dish detergent and a good big tablespoon full of washing soda, hot water and you are good to go. Wear gloves, washing soda is a bit harsh on your hands. You can also add it to your (clothes) washing machine and use half the amount of washing powder/detergent. It cuts grease, is cheap, softens water, more environmentally friendly and you can use on most surfaces. I keep a little sugar basin and spoon (labeled of course) on my kitchen windowsill, add a dash to the washup water and it gets dishes cleaner, quicker. If I use the dishwasher I chuck a bit in there as well.