The reason they can lift the tint isn't because of ammonia in the cleaner, or any other chemical at all. Tinting on auto windshield is actually a thin layer of tinted plastic. Actually, it's really quite similar to monokote in the look and feel of it. Anyway, the way it's applied is the tint is cut to shape, the application area is cleaned, a thin layer of windex is sprayed on the area, the tint is put into position, and then the windex is squeeged out from under the tint (yes, this is exactly the same way that the windex method for monokote is applied). The reason that windex can lift tint is because it can seep under the tint layer which will loosen the bond. If that happens all you really need to do is let the tint dry again and it will be fine.

This is exactly what Bruce was saying above. If you let windex "sit" on the monokote it can seep under the covering and loosen the glue bond. But that can take hours or days before it will happen. Simply spraying on windex and wiping it off won't hurt the covering at all. I've been using cleaner like this for years (10 to be exact) and have never had any problems with it at all. You'll be fine using it.

Ken