User blog comment:Kogath/Monster Hunter 4 Ultimate for the Nintendo 3DS/@comment-5020152-20150618003158/@comment-5569775-20150618035610

Try doing the "Key" quest hunts against Kushala Daora, Teostra, or Chameleos. Which ever is easiest for you.

And if that's what you've been doing, then the desire sensor just really hates you.