It works well. But put it on the bottom of the tub when you start the machine...it will drain on the first rinse. My dishwasher and others also do an initial rinse which drains, you can hear it in the sink drain. I think this will also drain the cleaner. I think it's best to add it when the dishwasher enters a longer main wash cycle. Maybe it's just me. I waited a long wash to add it after the first pack was gone.