A roll of toilet paper on a refrigerator shelf is an unusual sight, but this domestic hack has circulated in Spain for years. The premise is straightforward: cellulose in toilet paper can absorb moisture from the air, potentially reducing condensation and unwanted odors. As temperatures rise, the trick has resurfaced online, with sources such as Clim Profesional recommending a fresh, dry roll every three to four weeks.
But does the method deliver on its promises? The science is mixed. Cellulose is hygroscopic, meaning it can attract and hold water molecules from its surroundings. Research published in Scientific Reports confirms this property in nanocellulose, showing that its moisture content rises with humidity. But, these studies do not specifically test how well a standard toilet paper roll works inside a household fridge.
Moisture Absorption Limits
In practice, a dry, porous roll may absorb some humidity from the air inside the fridge. How much depends on the type of paper, the fridge's ventilation and the overall humidity level. No reliable data quantifies how much condensation a toilet paper roll can reduce in a domestic setting. Experts so caution that this is a limited home remedy, not a replacement for proper humidity control.
Odor Control: Fact or Fiction?
Some advocates say toilet paper can also help neutralize bad smells by absorbing moisture and airborne substances. Yet no independent testing confirms this effect inside a refrigerator. Major appliance brands such as Bosch recommend tackling odors at their source: thoroughly clean the fridge and remove spoiled food. The US Department of Agriculture also prioritizes cleaning, suggesting baking soda or coffee grounds for persistent smells instead of paper products.
If an unpleasant odor appears, first check for spoiled items, spills or hidden grime. Toilet paper may slightly dry the air nearby, but it will not eliminate the root cause. If odors return after cleaning, inspect food containers and surfaces again.
How to Try the Trick Safely
For anyone curious to test the method, the guidelines are straightforward: use a new, clean and completely dry roll. Place it on an upper or side shelf, away from liquids, where air can circulate freely. Replace it every three to four weeks, or sooner if it becomes damp or stained. Never use toilet paper to mask dirt or extend the life of questionable food. Thorough cleaning remains the most reliable way to control odors. There is no need to add chemicals or fragrances to the roll, as these could affect nearby food.
Temperature and Storage Matter Most
Spain's food safety agency, AESAN, recommends keeping the fridge between 0 and 5 degrees Celsius. Keeping the door closed as much as possible, avoiding overcrowding and separating raw from cooked foods matter more for food preservation than reducing humidity with paper. Some modern fridges even feature drawers that raise humidity to better store fruits and vegetables, reflecting the different conditions foods require. A roll of toilet paper can be tried as a minor absorbent, but temperature, cleanliness and proper storage remain basic to a safe, fresh refrigerator.
