I'm posting this in case people haven't seen it. Patti Frantz tells how to take the worst scummy clear and make it close to perfect. It works! I tried it with all the crappy clear I had sitting here and I can now use all of it. Scroll down to the post about The Perfect Clear. Once I cleaned and dried the glass I rolled it in tissue paper to keep it clean. 9 years of clear I can use
http://frantznewsletter.com/blog