Pressure cooker sound is only good, there is sound mainly because it has to discharge the gas in the pot, increase the air pressure so that the temperature rises to speed up the rate of cooking things. If you are still not sure can also consult the after-sales, of course, I am talking about their own experience, it is possible that your pot is bad, it is best to consult a professional. If you use it for a long time, it is best to clean it: cleaning of the inner pot: remove the inner pot from the electric pressure cooker, wash it with household detergent and rinse it with water, then dry it with a soft cloth. Note, do not use metal brushes or other coarse and hard washing utensils to wipe the inner pot, so as not to damage the coating of the inner pot. Cleaning of the exhaust valve and valve seat: Take out the exhaust valve from the valve seat, use a chopstick to hold a corner of the towel to clean it, and then dry it with a soft dry cloth. Cleaning of anti-blocking cover: remove the anti-blocking cover from the exhaust valve, wash it with household detergent and rinse it with water, and then dry it with a dry cloth. Shell cover cleaning: Use chopsticks to hold a corner of the towel to clean, and then dry with a dry soft cloth.