Putting Baking Soda in the Bottom of the Bin: Why It Helps

Putting baking soda in the bottom of the bin is an easy way to reduce moisture and manage some of the odours created by household waste. The powder is not a fragrance: it can react with certain acidic compounds that cause unpleasant smells, while helping to keep the base of the container drier. This is particularly useful on hot days, when food scraps spoil more quickly.

What is the purpose of putting baking soda in the bottom of the bin?

Baking soda primarily helps with odour control. As it is mildly alkaline, it can neutralise particular acidic compounds found in waste and make them less volatile. The powder can also take up small amounts of moisture reaching the bottom of the bin through bin-bag leaks or condensation.

For this reason, it works better as a preventative measure than as a way to mask a bin that is already very dirty. Built-up organic waste must still be removed, and the container should be washed whenever there are liquids, grease or stuck-on residue.

• Helps to control some odours;
• Absorbs small amounts of moisture;
• Reduces smells without introducing a strong fragrance;
• May make upkeep easier between washes.

Why does heat make rubbish smell stronger?

Higher temperatures speed up various chemical reactions and encourage microorganisms to act on food leftovers. Peelings, meat, sauces, fruit and other organic waste release volatile compounds more rapidly, allowing the smell to spread through the room. As a result, a kitchen bin can develop an odour far more quickly on hot days.

How can you use the powder properly without making a mess?

Once the bin has been emptied and cleaned, allow the inside to dry, then scatter a thin layer of baking soda directly across the base before fitting a fresh bag. There is no need for a thick coating: a small amount is enough to come into contact with any drips escaping the bag and with the air in the lower part of the container.

You can replace the application once a week or whenever the bin is washed, although the right frequency depends on how it is used. A household that disposes of plenty of wet waste may need more regular cleaning, whereas containers used solely for dry packaging are unlikely to require the same level of care.

• Wash the bin if liquid or dirt has built up;
• Wait until the bottom is dry before adding the powder;
• Apply only a thin layer;
• Fit the bag over the baking soda as usual;
• Replace the product after the next clean.

Does baking soda replace washing the bin?

No. Baking soda helps to manage smells, but it does not remove food debris, biofilm, grease or liquids that have leaked from the bag. Where dirt is stuck to the surface, wash the container with water and washing-up liquid, rinse it and dry it before fitting a new bag.

• Remove rubbish before the bin overflows;
• Do not allow liquids to collect at the bottom;
• Keep food leftovers securely contained;
• Wash the lid, edges and inner walls when they are dirty;
• Do not mix different cleaning products inside the bin.

Why does this trick work better before the smell becomes strong?

The benefit of this method lies in addressing the conditions that encourage bad odours from the outset. Sitting at the bottom of the bin, the powder comes into contact with small amounts of moisture and some odour-causing compounds before they build up to a concentration strong enough to take over the kitchen.

The outcome also relies on basic household cleaning habits. Changing the bag regularly, removing organic waste at the end of the day when needed, and keeping the container dry remain more important than any single product. Baking soda complements this routine by helping to control moisture and some of the smell, rather than simply covering it up with perfume.