Even though I have been using windex to install semi door stickers for
25 years, with no adverse effects to the vinal lettering, there seems to
be a bad feeling to using Windex, among a few of you,
because it has ammonia in it, even though I instructed to use only a
fine mist of the stuff, not give the glass a bath.
Therefore, I would suggest for you folks to use a NON-AMMONIA, window
cleaning product.
The alcohol in the window cleaner, is the key, because it evaporates
rapidly,and leaves no soapy film under the sticker.
Please remember this is a suggestion only.
If you have another way that you feel that's easier go for it!

Good Bye, Good Luck, Farewell, So long,  arrivaderchi, and Chow, Chow,
for Now

Terry