Sorry if this has been answered already.
I am stuck in the cave near the water cooler. I have managed to open the claws to get to the goblets but can't get them to the water for Dumbledore to drink it cos I keep getting attacked by the inferi. Can anyone tell me how to get past this stage. I have tried using reducto on them but they just seem to come back in larger groups. I've been stuck here for days now. Plllllleeeeaaaassssseeee help!!!!