don't use dish soap except for stains, and only use dawn (other types can damage clothes I think - others have attested to dawn being okay, not me). For making your own detergent save the remains of bars of ivory/castile/felsnaptha soap melt them in a few quarts of water in some pot on the stove. Add washing soda, borax, baking soda. Then poor the melted mixture into a bucket full of warm water. This cools and forms a gel that can be used as laundry detergent (it's not very potent, but very cheap, you can spike it with tide I guess if you must).