Dear Dáithí: Dirty, loud housemate is ruining my life

"You are a mature student and, I’m afraid, what has moved in recently is an immature one and she needs to be dealt with because this problem isn’t going away on its own."

Dáithí Ó Sé: "Take pictures of the dirty mirror. Pull all the hair from the drain and leave it near her makeup"

Dear Dáithí, 

I’m a mature student, male, aged 27, and up until recently I shared a house with two other people, a couple.