Steam or water leaks from around the pressure release valve during cooking, even when set to 'Seal'.

Safety first: Turn off and unplug the cooker. Allow it to fully depressurize before touching the valve.

Steps to resolve:

• Disassemble valve: Remove the pressure release knob or cap according to the user manual. Note the order of parts.
• Clean thoroughly: Wash the valve parts and the metal valve seat on the lid with warm soapy water. Use a soft brush to remove dried starch.
• Inspect gasket: Check the small silicone gasket or spring-loaded seal inside the valve. Replace if cracked, deformed, or hardened.
• Reassemble correctly: Refit the valve components in the correct order and orientation. Ensure the knob can move freely between 'Vent' and 'Seal' positions.
• Test under pressure: Run a water-only pressure test. A small amount of steam during heat-up is normal, but continuous venting indicates the valve or gasket still needs attention.

Warning: Do not block the valve opening; it is a safety device.