This is an easy but time consuming cheat/glitch buy could be considered worth it. Due to the way a wands mechanics are made to work, you supposedly get one more "charge" to it, so for this and other reasons that I don't remember, if you drop your wand then pick it up again at least 40 times, it gets considered as a recharge on that move, so every action you take the wand will recharge.

NOTE: If you close down/exit the game, this glitch will reset