Changing the toilet is much more difficult than cleaning it. If the plumbing works well and is not split, there is little point in getting rid of it, because even the thickest layer of limescale can be removed.
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Why does a plaque form on the walls of the toilet
Urinary stone, rust streaks and calcareous deposits do not form immediately. If every day you clean the toilet with a brush using a special detergent for toilets, you will never see these defects on the surface of the sanitary ware.
Untimely flushing and sparse cleaning contribute to permanent pollution of the toilet. Human urine contains many minerals that settle on the walls of plumbing, increasing the layers of dirt every day. This precipitate is difficult to clean with a regular brush and brush.