I try to avoid using the "lav." but one comment & this is a fact, on our recent flight we were in the premium cabin, we had our own toilet, one between 63 people, the rest had 4 between about 250 people, same ratio I think. Our toilet was as clean at the end of the flight as it was in the beginning, the one's at the back were like pig stye's. What am I saying ...nothing really, just an observation.