is it safe to brush with baking soda?
Yes, just put toothpaste on your toothbrush and dip it in the baking soda. I would'nt do it everyday though...the baking soda might be rough enough to mess with your enamel. :)
Yes, but not every day.
I use a mixture of baking soda, salt and low warm water to rinse my mouth after brushing a few times a week.