We own a 2016 31KP Minnie Winnie purchased in 2015. I recently discovered the external tank heater on our gray waste water tank was coming unattached from the tank and and is hanging down from the bottom of the tank. It appears that Winnebago has attached the heater with an adhesive. Does the heater need to be replaced or can it be reattached to the tank? Thanks in advance for any comments or suggestions!