[gregzz4]

Don't change your soda mix ...
I bake 2.25 cups/594grams of baking soda, then mix in 3785ml RO

I've had the ends of my dosing tubes plug up before.
Solved it by;

Run 3/16" ridgid tube before the outlet and place a 1/2" or longer piece of airline tubing on the end.
When it plugs up, massage the airline tubing to break up the crud, or replace the 1/2" tip.