Sparklekleen is what we use...but I can't find it anywhere.
Alconox from
http://www.daigger.com/catalog/product;jsessionid=0001JGV45DETBJYFZTZ5GBEQVZQ:tu5 a83sd?deptId=SE+Cleaning+Supplies&prodId=SE5402A
is a similar product. The bottom line is it is a mild detergent, with
calgon...and it makes glass shine like new.