Or add salt and baking soda to the baking soda tooth paste you are using and do it daily...it will taste better that way anyway.
Sounds like a good daily rinse with bicarb might also be efficacious. Flossing with some baking soda around the gums would work pretty good. Arm and Hammer has a few baking soda toothpastes, one of which adds peroxide to its mix.
I can’t say one way or another. My dentist said not to dilute the baking soda, but I don’t know the exact concentration needed. Just powdered on a toothbrush will kill spirochetes after just a five second exposure, though.