In order to get the perfect rice from Cuckoo rice cookers you need to change the cover packing once a year. This is what holds the pressure for your pressure rice cooker
Signs you need a new rubber packing
All of a sudden you're rice is hard and does not have the same stickiness
The steam escapes through the lid
If there are additional back pressure
Rice was complete but did not exhaust steam
After the rice is complete, if you have standing water on the handle