1997 Lincoln (Cont'l) rear view mirror problem.

Hi all,
My lincoln rear view mirror has a glare control feature which I seldom used. It suddenly become darken as if it encountered a glare.
and never returned to the normal position. I see that darkening aspect is a fluid that fills in somewhow when needed.
How can I return the mirror to operate nornally or get rid of that fluid and forget about the glare control feature.
Any help wouild be appreciated. Thanks.
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