Reply To: Apple Pencil Pro squeeze gesture stops working inside Notes after screen protector swap

Squeeze detection requires a minimum ~0.8 N normal force distributed across the flat bezel; a thick, rigid glass protector can act as a stiff shim that redirects finger pressure toward the curved barrel instead of the flat electrode pads, especially if the protector overhangs the Pencil’s flat edge by >0.2 mm. CLI check: sudo powermetrics --samplers smc -i 100 -n 1 | grep -i "pencil\|stylus" while squeezing to verify the SqueezeForce telemetry channel reports >800 mN at miss events. Recovery: Apply a 0.1 mm conductive copper tape shim only on the flat bezel under the protector (aligned with the two rectangular squeeze electrodes) to restore the force path; alternatively, enable AssistiveTouch → Custom Gesture → “Squeeze” as a software fallback while testing thinner protectors (ESR Paper-Feel 0.15 mm or Apple’s own Polyurethane sleeve).