heres my take on the situation,
Ive heard, and I believe this is true if someone can back me up but using windex on tinted windows is very bad because of the amonia D in windex. I have used Stoners IG and the newer Sonus window clearer and both are very good. I found that using windex usually causes alot of streaking and can be a pain in the A$$ to buff out in certain situations. Staying with an automotive based window cleaner is always your best bet.