I've only heard of, and used, Windex to help clear a printhead clog, by parking overnight the printhead on a paper towel soaked with Windex. It works, and I never noticed any resulting problems. I did this with color bulk inks delivered via a CIS. [Non-text portions of this message have been removed]
Message
Re: Damage from Windex
2011-06-03 by Ken Jaskot