Hi, All.
Somewhat OT... not real science (but related), not electronics and
it's maintenance rather than repair...
You can clean the inside of the glass of a wood stove very effectively
by using automotive "Bug and Tar Remover". It works at least as well
as specialized wood stove products, costs less and is easily found in
automotive supply stores like Canadian Tire in Canada.
Now back to my radio restoration hobby - I have a 1948 Viking 5-tube
AM-only superhet on the bench... chassis recapped, re-aligned and
working, now to face the cabinet...
Cheers,
Roger