The top half of the white orb is glued to the bottom half, right above the semi-transparent LED ring that runs around Homey.
You need to insert either a very thin knife (Exacto-type), or a strong thin wire (dental floss) in between the LED ring and the top (on @TedTolboom’s Homey, it was glued shut so well that we couldn’t use floss), to cut through the glue. This is the most difficult part of the process. Just take your time, run the knife around the circumference loads of times until you feel that the top half separates a bit. At some point, you may have to use a bit of force to pry it off (it may sound a bit scary, like you’re breaking things, but it’s the glue “breaking”).
Don’t put too much force into pulling the top half off, as there are a few wires running from the PCB (which is fixed to the bottom half) to the top of the dome (antenna wires).
Once it’s off, you can disconnect the Zigbee and NFC antenna’s (there’s still the WiFi antenna attached, but it’s on a relatively long cable), take out the plastic screws that hold down the LED ring and PCB, and gently pry out the PCB (which is also a bit of a challenge, because it is stuck in there hard).
