Yellowish and grooved tub, here’s what to do
If the bathtub is damaged, it is recommended to frequently use baking soda which, in addition to cleaning, minimizes the grooves, without damaging the enamel of the bathtub , as any other chemical product can do.
If the scratches are deep enough, you can dilute the baking soda with white vinegar, which in this case acts as a degreaser and disinfectant. To prepare the mixture, add some baking soda and add pure vinegar, without water. Then, pour the mixture over the affected areas and rub with a broom, using circular movements and focusing especially on the dirtiest areas, which require more effort.