An egg decapping apparatus is provided. Such an apparatus includes a reference plate defining a plurality of reference openings therethrough. Each reference opening is adapted to receive an avian egg therein from a lower side of the reference plate and to stop further upward movement of the avian egg within the reference opening when an upper egg section to be cut extends from the reference opening above the reference plate. A cutter member is positioned above the reference plate. The cutter member is moveable across the reference plate and the reference openings from a precut position to a post cut position for creating an opening in the upper egg section. A cleaning member is moveable with the cutter member across the reference plate. The cleaning member is actuatable at the post cut position so as to remove debris from the upper egg section accumulated on the cutter member. Associated methods are also provided.