Other refrigerators that I have worked on usually have a tube towards the lower back portion of the refrigerator that I can take off and then snake out the drain. This refrigerator does not. It has a drain nipple that is visible underneath the refrigerator going into the drain pan but I cannot access the tube anywhere from behind. Can I gain access by taking off the air distributor in the refrigerator? If so does the air distributor just pop off?