After realizing it was working I took this picture...
And here you can see the final result... :-) Isn't amazing? The tub is shinny again!
All I had to do was to mix the baking soda with enough water to make a thick paste. Then I scrubbed the tub. It's just hard work. Not complicated at all.
I guess my hero deserves a picture! :-)
My bathtub will never ever have dark stains again! It's easy to get rid of them with baking soda.
Hope you all have a nice weekend!