Finally back clean tiles

I've been looking for a cleanser that gets clean my slightly rough tiles again .... 1 times a year you have this basic clean. Until now I had done it only with oven cleaner, which is neither healthy nor economically.
I bought the cleaner in the local supermarket, the way for less than € 5. My Tiles are like new and the joints are clean again (which I've plagued me with soda and toothbrush!).
For me, this product is a great help!