My joystick sticks in the up position (see photo).  I have tried moving it around repeatedly to lossen any dirt, etc. that might be causing this, but to no avail.  This makes it very difficult to use the joystick for fine movements.

Hi there. Thank you for reaching out and we're deeply sorry for the trouble that this has caused. In this case, I'm afraid that you may consider sending the unit in for a proper diagnosis. You can contact our support team to start up a ticket at https://www.dji.com/support . Also, the warranty can be applied depending on the outcome of the damage assessment including the warranty period of your unit. Thank you for your kind and understanding.