We could start by saying that a shower floor as dirty as this is almost impossible, but you would be surprised of what can do dirty feet to a shower floor ....
In his case, it is the shower in the basement, the one his teenagers use exclusively, and it is almost by chance that he realized the condition of the shower that is hidden by a curtain. Boys are supposed to clean their bathroom after all ...
Let's say teens have ignored the cleaning bit...! It's so dirty you do not even know what color is below the dirt!
After trying all common cleaning products, the floor was still dirty.
In desperation, he decided to try the oven cleaner ... and that's what worked best! Incredible, isn't it! The shower floor is as clean as it can be, no dirt anywhere!
I like it when someone takes the time to try many things before saying: I found the right way to do it! It saves us time and energy! Because I would never have thought of using some Easy Off cleaner in the bathroom!
In the video of his demonstration, he rubs everything with a sponge, but he says that if he had waited longer, the cleaning effect of the Easy Off would have been better and he would have rubbed less. [Pub]
** Take a test on a small part of the shower before putting it everywhere: it is oven cleaner after all! This product could damage some materials - I do not know what your shower floor is made of - so test on a small part before making a blunder!