There is fluid leaking from my rear view mirror on 2002 Jaguar S-Type

Rookie cbe0621eac06868b3efe0d8d1d3611e23c60d3114864ea2ec19a68cfbd3eebab
there is a film on the rear view mirror and it seems like its leaking a little fluid
(1) Answer
An expensive piece,but it has to be is the elctrically reactive fluid that "dims" when someone behind you has their brights on.