Money, keys, passport … dishwasher? The dishwasher isn’t something most of us think about when planning a holiday. And yet there are simple things you need to pay attention to, both when you leave and when you return. The first is to never leave your dishwasher’s door closed when going on holiday. Otherwise you can expect to return to a foul-smelling and bacteria-laced kitchen appliance. That’s because few home appliances are more prone to collecting dirty, smelly pools of water than the dishwasher, which is why its door should be left wide open when not in use for long periods of time. By o…