Anyone have better success using RainX anti-fog than I did?

[DMTJAGER]

Had an inexpensive Bushnell Trophy scope unmounted doing nothing so I decided to try out RainX anti-fog on the lens surfaces and applied as directed. Put the scope in my freezer for 5 minuets' then removed it and it fogged up as bad as if I hadn't used the RainX .

Is this proof RainX anti-fog doesn't work or was my test to severe and hase anyone out there tried RainX anti-fog on their scopes or binos and had it work well and prevented you scope or binos from fogging?

 

[Southern Lights]

The coatings on the lenses may affect how it works. Also the RainX could damage the coatings so it's a risk either way. I wouldn't try it on an expensive scope.