The difficulty I think you are having is with dry sodium bicarbonate vs.a solution. Dry blasting needs to be followed by a water rinse to dissolve and remove the remaining bicarbonate particles.
Or you can skip all of that youtube bullshit and use your own brain matter.I want to know it all lol when I get to doing something I cant do it until I know every last detail and situation. I will watch 20 videos of the same process just to see different ways of doing it. It can be a blessing too. For example with my carrier bearings I was about to buy a special tool to remove them that was like 80 bucks then I kept researching it until I found out I can cut them with a dremel and knock em off with an air hammer. And it worked flawlessly without spending a dime!