Thread: Re gassing a scope

Hey Guys
Have a weaver grandslam im suspecting needs to be re gassed i guess with nitrogen?? anyone know any contacts that do this in NZ or is is not something thats done?,,,Seems to fog up slightly internally when wet and cold,which is most of the time at the moment up the Kaimais haha can wipe the lenses and still fogged up,,,any help appreciated