When all else fails, a guide could help. Make sure to look around in fps view, use every ability you have gotten til that point. Take a break if you don't sse the answer, but again: a guide is not an invalid option. Just be careful of spoilers

fairy bottles for the win

yeah thx, I will try a lot before looking at a guide

Remember, the item you get in the dungeon is almost always used in the boss fight somehow, look around and try different things!