Please follow the steps below to disassemble the big kitty paw key and find the reset button if you need to flash the firmware.
Step 1: Remove the keycap of the big kitty paw key.

Step 2: Remove the suction cup which is installed on the base.

Step 3: Disassemble the switch base and the switch term. Please follow the detailed steps as below.
1. Place the switch base part of the Big Kitty Paw Key flat on the tabletop.
2. Prepare a screwdriver and a soft cloth (e.g. glasses cloth), and wrap the tip with the cloth to prevent scratches.
3. Tilt the screwdriver tip and insert it (about 3 centimeters deep) into the gap between the switch stem and base, then lift the stem up. Repeat on the other side to remove the stem.
(Click to play the video below.)
4. You will find the reset button at the corner of the PCB in the base.

Step 4: To reinstall the switch stem and base, first ensure the lower inner portion of the switch stem is aligned with the slot inside the base, then align the grooved outer surface of the switch stem with the side of the base featuring the Type-C port. Then snap it into the slot. (Click to play the video below.)