Difficult to remove deposits can form in any toilet. Problem dirt such as persistent limescale, urine stains, or other difficult to remove deposits occur on the inside of the toilet bowl, but also in the neck or invisibly under the rim. The dirt under the rim means the toilet is never hygienically clean - it can cause a musty odour and it reduces the flush action of the toilet. The specially developed formula of HG toilet cleaner gel super powerful adheres to the surface of the toilet bowl and ensures an effective removal of all problem dirt. This product does not contain hydrochloric acid, because that substance affects the glaze of your toilet pan and makes it rough. Furthermore, hydrochloric acid gives off vapours that affect and damage the surface of stainless steel and chrome in your bathroom. In other words, HG toilet cleaner gel super powerful is safe for glaze, stainless steel and chrome.