That's a common and frustrating issue, especially in apartments or homes with limited space. Mildew loves the dark, damp, and organic matter that our bins provide. The good news is, preventing it is mostly about breaking that cycle. Here’s a natural, step-by-step approach that works.
First, the deep clean. Empty the bin completely. Take it outside or to a shower/bathtub. Use a long-handled brush and a solution of hot water with either white vinegar or baking soda (about a cup per gallon). Both are excellent at killing mold and neutralizing odors without harsh chemicals. Scrub every surface, especially the bottom and corners. Rinse thoroughly and let it dry completely in the sun if possible—UV light is a great disinfectant.
Now, build a protective routine. After this clean, sprinkle a handful of baking soda into the bottom of the dry bin. It will absorb moisture and odors. For your daily use, always use a liner bag, and try not to toss in super-wet waste without draining it first. If you must dispose of damp scraps, wrap them in newspaper.
The real secret is keeping it dry. After you take out the full bag, give the empty bin a minute to air out. If your bin has a lid, leave it open for a while in a ventilated area. Wipe down the inside with a dry cloth or paper towel weekly to catch any new moisture or spills.
For bins in tight spaces, like under the sink, consider placing a small, open box of baking soda or a few silica gel packs nearby to combat humidity. A monthly refresh with a vinegar spray (just spray and leave it, no rinsing needed) will keep mildew from getting a foothold.
Ultimately, consistency beats a once-in-a-while intense scrub. A quick weekly wipe-down and ensuring the bin is bone-dry between uses will make mildew a thing of the past. Your kitchen will smell fresher for it