Using PH0 Screwdriver remove the three screws circled in green.

Do not remove the 3 screws with red crosses.

Screws: 3@ M1.6 x 4 wafer head (white threadlock)

There is a rubber gasket under the conical section. Note the profile has the round surface fitting into the conical section, and the double wiper section pressing into the foam gasket on the body.