Don't try to do ANYTHING to it.
From your completely clueless idea about the lens,
which is NOT the reason for what you saw,
I can tell you have No business messing with it.
Now, let me give you the Really bad news:
The camera probably contains between 60 and 100 (or more) electrolytic capacitors,
all of which are likely to be bad or rapidly on their way to being bad.
Replacing them would be a monumental task even for an experienced technician.
Though each individual replacement part would be fairly cheap,
the total cost could reach several hundred dollars.
Then, the vidicon tube may have deteriorated,
and you might not be able to tell it is unusable
without the capacitors being replaced first.
Replacement tubes may or may not be available,
but even if you could get a new-old-stock one on the cheap,
the camera would need to be carefully adjusted
to accommodate the exact characteristics of the new tube.
That would take quite a lot of expensive technician time.
And all of the above depends on you being able to find a repair shop
willing to do the work without being quite sure of the outcome.
Not many will be.
Are you prepared and willing to spend upwards of $1,000
just to see what sort of image that old thing might have produced when it was new,
or does it seem more sensible to simply take it to an electronic recycler for a proper sendoff?