Most Flight Manuals recommend regular and repeated movement of the
controls in conditions where icing is possible. Opening and closing
the spoilers at intervals throughout the flight might not be a bad
idea in situations where freezing is a real possibililty. Again,
vaseline between the mating surfaces is a good preventative measure.
You'll want to clean and reapply for each flight to prevent it picking
up dirt.

"Vaughn" wrote in message ...
"Eric Greenwell" wrote in message
...
Chris OCallaghan wrote:

Has anyone had the spoilers freeze shut without having rain first, and
without flying in cloud?

No, but I have seen a case where one spoiler became disconnected
resulting in sudden asymmetric lift when they (it) were deployed in the
pattern. This is potentially a much more serious problem than than having
both spoilers fail to open. A good reason to test your spoilers early in
the approach and (naturally) in the preflight.

Vaughn