Our cat also loves boxes, and anything he can hide in, he will open cupboards to get in a sleep, typical cat stuff. But I ask this of all you cat owners how does your cat recat to mint? Mine goes nuts, he loves the teabag, he rubs the teabag, he sleeps with the teabag. He will rub the teabag until the side of his face is green with tea and cat spit. If I use Tiger Balm or other joint rub he will rub my knee as long as I will let him, weirdo cat.
And wolfen have your vet test for allergies, alto of times when they lick or scratch themselves raw it is allergies. My dog, Ruffian, will do that if she gets any food with corn in it, she will chew off her fur and bite at her skin until she bleeds, or she gets a yeast infection in her ear. Just a thought.