4. Dishwasher Tablets and Detergents

Storing detergent and dishwasher tablets in the cabinet under the sink is a natural progression, because this appliance is located right next to the sink in most kitchens. Be careful: it’s fine in case they’re new and unopened, but if they’re already opened, they’ll deteriorate quickly because of the humidity in the room. In addition, if you have children or pets at home, these products may be at their height and dangerously easy to access.

5. Potatoes, Onions and Other Foods

The problem is always humidity: products like potatoes and onions, flour, and even salt are very sensitive to humidity, and while they certainly need a dark place, they also need to be away from heat and humidity. Stored under the sink, they would quickly rot; it’s best to store them in a cellar or, failing that, a cupboard away from light, heat, and humidity.