Re: baking soda & vinegar ?
You can add baking soda to your wash---whatever looks good depending on the load. Usually about 1/2 cup or so.
The vinegar is usually added in the first rinse. A lot of mama's use a downy ball with vinegar in it--so it will automatically release during the rinse, it works great. I'd say about 1/4 to 1/2 cup vinegar too.
BUT, if you have hard water, you probably don't want to use vinegar, as it can cause more harm than good.