Karen, This product is exactly what you want to clean the carafes. Just follow the directions on the bottle. You may also want to get a good airpot cleaning brush. Like this - http://www.wholelattelove.com/Urnex/airpot_brush.cfm. You may want to get your brewer professionally cleaned if you do not have a great water softener system on it. It needs to be taken apart and cleaned and how hard it is to clean is going to be based on what model brewer it is. I hope this helps.