That's an excellent question! Dealing with a soggy, smelly trash bin is a common urban headache. The good news is that reducing internal moisture is all about promoting airflow and managing what goes inside. Here are the most effective strategies.
First, let's tackle the bin itself. The best passive method is to improve its ventilation. If your plastic bin doesn't already have them, you can carefully drill a series of small holes (about 1/4 to 1/2 inch in diameter) in the upper sides and lid. This allows warm, moist air to escape, preventing it from condensing on the cooler inner walls. Be sure to place these holes high up to avoid liquid leakage.
What you put *in* the bin is just as crucial. Always use a bin liner, but opt for bags labeled as "breathable" if you can find them. For standard plastic bags, try not to tie them shut too tightly; a loose knot allows some air to circulate. Furthermore, make a habit of draining all liquids from food containers, bottles, and cans before they go in the bag. A simple rinse can make a world of difference.
Strategic placement of your bin also plays a role. Keep it in a shaded, well-ventilated area if possible. Direct sunlight heats the bin, accelerating the creation of moisture and odors from the waste inside.
For an extra layer of defense, consider using moisture absorbers. You can place a small, open container of baking soda at the bottom of the bin (under the bag) to absorb odors and some ambient moisture. For more heavy-duty absorption, silica gel packs or even commercial moisture absorbers used in closets can be very effective.
Finally, the simplest rule: empty your bin regularly. Don't let wet waste sit for days. A consistent emptying schedule is your best defense against accumulated moisture and the pests and smells that come with it.
By combining better ventilation, mindful waste practices, and simple absorbents, you can significantly reduce internal moisture, making trash day a much more pleasant experience.