Oh, you definitely want to wash it or any other homemade spray off just as you would a commercial spray. Just realized you were originally asking after a commercial compost product. Why not start your own? In the meantime, check around for community garden programs or local farmer's markets to see who might be offering organic compost in your area.
Also, if you compost with worms you will see the results a lot faster. You can use a little of the compost you have on hand to start your own. That way you have control over what materials are in the soil for your plants. (For instance, I don't really want a product with manure.)