Solution: Items placed too close to the Parcelcube need to be moved
Solution: Parcelcube cannot be placed next to a brick wall or alike.
Solution: side walls are bent out of shape or extremely dirty / filled with tape residue or alike. Clean it up.
Solution: older Parcelcube without their red sensor glasses, should be cover up sensor in same way the red glasses do via tape or red sensor glasses.
Solution: If not working send environmental pictures to Parcelcube support.