I make my own oxygen cleaner similar to oxy-clean and it works very well. I do however pre-treat our really dirty MF's with Dawn blue, but most simply get washed in a washing machine with about half the recommended dose of my choice liquid laundry soap (ERA) mixed with my oxygen cleaner in a commonly used hot solvent. They'll get a 2nd rinse with a small amount of white vinegar before I dry them. They always come out clean and they work like new.