Bought to clean the fireplace glass, I now use this cleaner for more than a year. Three bottles have been sufficient approximately for 14 months. The fireplace we make about 2 times / week (3 times in winter, 1 time in the summer). Initially inexperienced, I have the plate sprayed only for 20-30 minutes and then had to correspondingly good scrub. Now I leave the stuff to act and just need to wash it off with a wet cloth and dry with a kitchen towel roll after about 45-60 minutes. The dirt can be washed off really easily without any special effort. It is almost odorless and not dripping from the window (yes foam). Only the dishes have to be careful that nothing drips on the floor, but here you can also keep a bucket underneath. Overall, a great product at an unbeatable price.