1, stop open valve problem clockwise rotation of the lid, if the lid activity, indicating that there is no air pressure in the pot, can not open the pot is the stop open the valve did not return to prevent you from opening the lid. You can find a hard object (such as chopsticks), press the check valve, prompting the check valve back to open the lid. 2, there is still air pressure in the pot if the clockwise rotation of the lid does not move, it may be that there is still air pressure in the pot, it must be cooled to relieve pressure. Generally natural cooling, wind cooling and lifting pressure felling. If you are not in a hurry to open the pot, it is best to use the natural cooling method of pressure relief, as a last resort, generally do not have to lift the pressure to vent pressure. 3, the lid attached to too many foreign objects attached to the lid too much to create, should be timely, often wash the lid of the residue, to ensure that the lid is clean.