How do you keep sponges from smelling? Soak that kitchen sponge at the first faint whiff of unpleasantness, ideally even before matters get to that point, to discourage the nasties that can do nasty things to you. Immerse the entire sponge in full-strength white vinegar or in lemon juice, both acidic liquids, to kill bacteria, mold, yeast and viruses.
How do you get the smell out of a kitchen sponge? Soak in vinegar and then soak in a mixture of baking soda and water. Put the sponge in the dishwasher.
How often should you change your sponge? Wring sponges out after each use and clean them every other day. While those are great habits to get into, even a sponge sanitized this often could accumulate bacteria over time, so replace yours every two weeks—or even sooner if they develop an odor or fall apart.
Why does my sponge smell like dust? Food and dirt particles get trapped between the fabrics’ fibers and sponges’ pores that start to decompose quickly in the wet environment. During this process, bacteria, germs, yeast, and mold build-up that causes sour and mildew smell. This is not only about the unpleasant smells, however.