A year and a half ago I wrote about the Hyatt Regency Crystal City improperly charging me for a bottle of water. It’s a tiny matter the scheme of things, but if everyone ignored small charges, it would create a very strong incentive for hotels to purposely tack on charges like that, small enough that no one bothers, but at $3++ per room night actually meaningful. All guests would be worse off.
And I stay at enough hotels (around 150 room nights last year) that those $3 overcharges start to add up. Hotels never seem to leave off charges from my bill. Mistakes always seem to be in the hotel’s favor.
So always check your folio. But that’s not enough. You have to watch your credit card statement too.