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["Make washing soda: You can create the chemical reaction needed to change baking soda into washing soda simply by baking it at 400F (200C) for about 30 minutes.", "Once you get the hang of it, you might find that it actually changes sooner than that.", "Use a shallow pan with sides (aka a jelly roll pan) and spread 1 to 2 cups of baking soda out in a thin layer.", "After about 10 minutes, stir it around.", "http://naturesnurtureblog.com/2012/05/08/ttt-turn-baking-soda-into-washing-soda/ has a step-by-step tutorial with a good picture that shows what the washing soda will look like when done.", "Once you have made it once, you will be able to tell.", "Mainly it is in the ""powderiness"".", "Baking soda clumps together but washing soda is like really powdery snow that would not make a snowball.", "Measure out 1 cup of washing soda and continue on to step 2.", "Put washing soda into a large bowl.", "Slowly add the castille soap in a steady stream while whisking to incorporate it well.", "Now add 1 cup of baking soda.", "You may want to use a spoon to work out the lumps.", "It won't be possible to get rid of them entirely though.", "Now the fun part!", "Slowly add the cup of vinegar.", "It will foam up so that is why you need a large bowl.", "Stir it rapidly and the foam will dissipate.", "You may need to use the spoon again to break up the clumps to the best of your ability.", "Each time it seems to be different, if you find it is too ""stiff"
