Hesson11, not too sure whether my fingers are made of steel but my dealer helped me remove the grilles, with his bare hands. He had done that with most of his customers' pairs. A few of my friends removed the grilles by themselves without any sort of aids as well.
If the grilles are fitted too tight in the groove and can't be removed without any form of tools, then the magnet remover may be feasible. After the grille is removed for the first time, there won't be any problems removing them after that provided one does not push the grilles all the way into the slot with full force.