I don't think they work.
I used this cleaner on "Normal" wash and put the tablet in the pre-rinse section as there weren't any coherent instructions other than "Add tablet, run dishwasher on hot for 2 hours". So, after the wash the dishwasher looked as clean as it did before the "cleaning" cycle. Probably not worth your money, but I figured I'd give it a try.
Rating: 1 stars