Your thoughts on cell interior cleaning

This is something that doesn't frighten me technically speaking.
But I find it generally prudent to ask about matters that will cost
more than $20 to experiment with.

I found an old Fujinon WS 210/5.6. The single-coated version.
Inside the front cell, in the air space, is some fogging on the glass.
Inside the rear cell, in the air space, is some edge fogging.
(The only thing that makes me hesitant about taking this on is the
presence
of some cleaning marks on the rear cell.)

So I checked Kerry Thalmann's online Fuji brochures to verify (and it
proved true)
the open air space within each cell.

While opening the cells won't be a real issue, my concern in cleaning
methods.
What would be an appropriate approach to cleaning fog off cells and
subsequently keeping the interior appropriately clean?
My first thought is standard lens cleaning fluid. Just keep it wet to
avoid
marking it. But this may or may not be adequate.

Has anyone done this, or are you all too scared?

Or should I see about getting a better bargain and try to get the
cells cheaply enough to justify the experiment?

Your thoughts?

TIA,

Collin (the bargain hound) Brendemuehl