How to clean a dirty bathtub?

1, first scrub with vinegar, then wipe with sodium bicarbonate, and finally rinse with clean water, so as to remove the scale and stains on the bathtub.

2. The yellow dirt on the bathtub wall can be made into a solution with bleaching powder and water according to the ratio of 1: 9, and then wiped with a cloth, so the dirt can be easily eliminated.

3. Slice the lemon and cover it on the yellow mark in the bathtub to make the yellow mark disappear gradually.