In a campervan it's easy to think that everything works like at home, but it is precisely here where the most common mistakes should be avoided.
The fridge takes longer to cool in a campervan than at home, so it is best not to store hot foods. In this case, leave them for a few minutes at room temperature and set a cooling temperature differing by not more than 15 degrees with respect to the outside temperature. The fridge should be emptied and cleaned with vinegar and lemon after every trip.
The general advice is to always try and use only a small amount of water, especially for cooking food. To prepare pasta, for example, choose types that cook quickly: you will save energy and avoid to creating condensation in the compartment and the risk of making the whole place humid. This is particularly important in winter, when the campervan is often kept closed.
The hot water of the pasta should be drained in a closed sink and even reused to wash the dishes, adding a little vinegar which reduces the starch present. Avoid normal dishwashing liquid because it creates lots of foam and can cause filling of the tank water. Use dishwasher soap powders. Always use anti-putrefaction products in the sink, to prevent bad smells coming from the tank.
To clean cookers, use a dry sponge; if it is too wet you could inadvertently activate an electric hob, thereby flattening the batteries. Use aluminium foil to cover the hob when cooking something that can easily stain the steel and the surrounding spaces.
Final cleaning will be less and certainly easier.
Therefore carefully choose the type of pots to take on trips, preferring ones with a thin bottom to help save energy. Limit their number to a minimum, to save space and to avoid annoying noises while travelling.
During cooking, in case of dense smoke or flaring up, use a damp cloth to extinguish the fire or thin out the smoke - NEVER use water.
Before leaving, it is advisable to plug the drains, as this will prevent the water inside the traps from agitating when the campervan is moving along and in corners. Plugging them will create a negative pressure that will prevent water from flowing out and spreading bad smells. Also, remember to never dispose of hot oil in the drains.
Of course If you enjoy going to the mountains in winter, don't forget to sprinkle concentrated radiator antifreeze in the sink, washbowl and shower. This will prevent the tank from freezing.