Cleaning of your Car Cover

Its gotten a bit dirty on the outer shell and I wanted to clean it up a bit.
Now, I've researched on some of the carcover sites and one says:
-Wash cover in a commercial washing machine. Use a mild detergent if cover is soiled. Do not put in dryer. Hang up to air dry. (the quick description!)
Another says:
-Use a large commercial washer without agitator, wash the cover using 1/4 cup of Simple Green All-Purpose Cleaner. Put the cover in the washer and pour the cleaner in the tub after it's filled with warm water or pour it directly in the machine, then put in the cover and start the machine. Rinse the cover twice to remove all cleaner. Air dry
Has anyone used these methods or used their own to clean one?


