...most interior windshield fogging in my experience, is not a "result of " a glass cleaner

rather the fogging appears to be sourcing from the interior materials used in the car: leather & plastic & metal (as well outside gunk that has gotten inside)

there's good suggestions posted in this thread

I have tinted windows in the E500, and clean the inside with just a buff with a 100% cotton terry after passing a mild soap&H20 100% cotton terry towell 1st.

-fad