To change any of the settings press and hold the ENTER button for three seconds. This will put the unit into “Change Settings” mode. Press the down/up button to move through the menu until you find the setting you want to change. To change the number of days you would find the 'Hatch timer' setting. Press ENTER again and you’ll see an asterisk (*) appear in front of the text. Press the UP or DOWN button to change the setting. Press ENTER again to save. After changes have been saved press the DOWN button until the screen reads “please wait”. This will take you back to the main screen.