I headcanon that they are pretty clean creatures, unless they have a messy kill or a particularly adventurous night 😉
They do love all kinds of creature comforts, tho, so I’d imagine Lestat especially loves baths. Louis is like a cat and has to be dragged into any body of water! Louis
dislikes unnatural chemical scents, so he doesn’t like most scented products, unless they are legitimately natural.

Louis and Lestat are my OTP. I think they can be very romantic. However, I think that Lestat constantly ruins romantic situations. The shampoo unicorn horn will ruin the sexy candlelight bath any time.