Received GoWISE USA GW22620 4th-Generation Electric Pressure Cooker today and very excited to give it a try. Fill the stainless steel pot with clean water in half way, and then press the [Soup] button to start. came back after few hours and the cooker was in warm stage. Empty the pot and found a lot of white spots on the bottom of the stainless steel pot. and cannot be cleaned. I doubt this pot is made of stainless steel material? ..... I think that it is a serious quality related problem. Can you image if I used it to cook real soup with salt and other seasonings...... that may be even worse.
UUPDATE 11/30/2017 It is my 2nd time to use the cooker. After boiling apple, all of the white spots gone. I increased the rating from 1 star to 4 stars. I chopped 10 apples into small pieces and add 2 OZ water, use [Rise] function under high pressure for 5 min. The GoWISE USA customer service respond my review quickly, thanks.