How to Make a Homemade Washer Freshener

You will need:

3% hydrogen peroxide solution

Sodium bicarbonate (baking soda)

Mix ½ cup (115 mL) hydrogen peroxide and 10 g of baking soda in a cup. Let it sit until the hydrogen peroxide starts fizzling. Start your washer, pour the solution in, and let it run through a cycle (rinse only cycle is recommended). Add some scent if desired.

The chemical explanation of this process is: The hydrogen peroxide is adducted to the sodium bicarbonate, forming sodium percarbonate in situ. Sodium percarbonate is used in commercial washer fresheners.

Comments

[plumbing]

The aount of ingredients must be measured properly to gain the desired result. And to make the scent last for a long time.

[LanthanumK]

This version is much cheaper than the store bought version but it is not scented. Its purpose is to kill the bacteria that cause the stink, destroy the stink molecules by oxidation, and remain
for a while. Once the freshener is washed out of the system and a new load of bacteria is added, the stink will return. A slow release mechanism would help it to last longer.