The maid tenders her resignation after having to clean off that mirror several times daily. She was later hear muttering, "So many handprints, lipstick marks and mysterious fluid stains!"
Before you get mad at Aya and Mitsuki, remember that these two are Teeny, Tiny Baby Gays. They have to crawl before they can walk. They're gonna fall flat on their bums more than a few times, before they get the hang of it.