Our room had a foul vinegar smell and there was a fairly large spot on the floor where it looked like there had been an accident. It was late when we checked in. At that time we did speak to the front desk and inquired about switching rooms but none were available in the size we needed (2 queens and sleeper sofa). We asked for febreeze to try to cover the smell, and it temporarily worked, but the smell seeped through. We mentioned this again upon our check out, mentioned Hilton's satisfaction guarantee policy and they said they would check the room for the smell and have the manager contact us, however since we booked 3rd party there was likely nothing to be done. The manager contacted us a couple days later and basically said no one else on staff smelled anything foul (of course), too bad for us, and we should have come back again after the Febreeze didn't work and they would have done something else for us. It was already past midnight by that time we tried the Febreeze, and I was not going to further waste hours of sleep. Plus they had already told us there were no other rooms of the size we needed. When leaving the hotel, we did see large gallons of vinegar on the housekeeping cart. I believe this is the main method they normally use to clean (they do allow dogs), so staff must be nose blind to that smell. Other than that, the breakfast was good.