Charles & Sandra Cohen
I was on a sailboat for three years, with an IC-706, on the Pacific Coast, in warm water. The IC-706 had the dreaded glass fuses in its power cord -- much more trouble-prone than ATC fuses.
I spritzed the fuse contacts, at the start of the voyage, with Boeshield T-9 -- a mixture of anti-corrosion ingredients and wax:
. . . They never gave any trouble.
I got into the habit of spraying it on _every_ connector, before plugging it in, or tightening a screw on it. Slightly gooey, but very, very effective.
Boeshield T-9 is cheap and not hard to find.
. Charles / va7cpc