I've a feeling you'll find the butyrate affected all the way through. None of those fixes helped mine, but they sure made 'it shiny! My first one was fine for two years, and in the third year it almost seemed to cloud overnight... that one's still in use, however, - I gave it to a friend who registered, and still reports daily. Keeps saying he's gonna get a new one, but "I can still read it... it's cool".
Le'ssee: $10 - $20 for lens kit; 0.5 - 1 hr labor at $12.00hr - gas for trip to store: $3.50...= $19.50 - $35.50 ... or somewhere close to a new one.
Starting a new observer: Priceless
(Course I'm personally worth more than $12/hr, but had to put something there
)...