RE: baking soda
I've added baking soda to the wash and rinse for years .
I'm currently using a soloution of BS and water in a Downy Ball , about 1/2 cup in 1/2 cup of water , so I never miss the rinse cycle. Then I add another 1/2 cup of BS to the wash along with some Sport Wash . It's probably the cheapest and most effective way to descent clothing .