Why does Beowulf insiston fighting grendel without weapons?

Beowulf must kill Grendel with his hands because Grendel put a spell on human weapons so that they could not harm him. Beowulf using his hands adds to he hyperbole of the epic poem. The magic and Beowulf's strength add to this hyperbole and make it more epic, and the one on one man vs man, good vs. evil make it more epic as well.