hey guys, I have a stainless steel weaver 4x that sits on my stainless ruger 10/22. a good combo I think. but the other day I took it out to use and noticed the INSIDE of the frot lense is dirty?? it affects clarity and brightness.

where could I get it serviced (I'm guessig open it, clean and then seal it again) and is it worth it? I know they aren't high dollar scoped but I don't see stainless around often