Nauticam viewfinder condensation moisture

Does anyone know how to completely disassemble Nauticam standard viewfinder? Even if I can evaporate the moisture out there appears to be some deposits left. In the attached image the last O-ring remaining seems to be impossible to grip to pull out. Not sure what else I'd have to do afterward.

Thanks in advance for directing me to any resources or threads about this.

Kurt

The photo shows that, in addition to the water leak, the lens O ring has multiple small cracks, indicating that it is worn, and the viewfinder needs an overhaul by an authorized Nauticam dealer or by Nauticam.  It might be a good idea to speak with a dealer such as Optical Ocean Sales or Backscatter and follow their recommendations.