Use ONR - without drying it, just let it self dry

[rzatch]

You are correct, it does leave behind a film, noticed it on windows and glass, it also can leave water spots if not properly dried, makes me kinda wonder about the posting on this page from Dr. G

We`ll see if the OP comes back with any reply and that could indicate the reason behind the original post. May have been a harmless oversite on his part.