On 13/05/2020 09:44, Another John wrote:
I've got an old (c.25 years) pair of binoculars which are "hazing" due
to age: I'm assuming that the haze is internal -- the four outside lens
surfaces get cleaned regularly.

I've often looked at doing it, but always chicken out when I start to
unscrew things: is it actually possible to dismantle the binoculars and
clean the inside lens surfaces?

Cheers
John

If the hazing badly affects using them and they dont have a high value,
then you have nothing to loose from attempting to improve things.
Start with removing the lenses and cleaning their inside surfaces.