Weber 6 Oz Liquid Stubborn Stain Remover

I followed the instructions and the result is very disappointing. Plus I have the same bbq as in the picture of the bottle. My bbq is only 3 years old and not very dirty so I was hoping for good results. Once the 5 minutes of waiting have elapsed after applying the product, you must take a damp cloth to remove the opaque white powder which falls everywhere on the dark surfaces and which you must clean afterwards. In short, once all the product was removed, the result was the same as before: nothing cleaned and the spots are still there! An expensive product for mediocre results. Surprising from a reputable brand like Weber.