3 Practical Uses for Used Coffee Grounds

If you brew coffee at home, you’ve probably tossed out the soggy grounds left after brewing without a second thought. But what if those grounds could help solve common household problems—like smelly fridges, damp shoes, or even pesky bugs?

Used coffee grounds aren’t just waste. With a few simple tricks, they can freshen your fridge, dry out wet shoes, and help keep cockroaches away from your kitchen. Here’s exactly how to use them.

1. Absorb Fridge Odors with Freshly Brewed Coffee Grounds

Leftover coffee grounds still hold plenty of absorption power right after brewing. To neutralize bad smells in your refrigerator, simply spread the damp grounds in a small bowl or open container and place them inside. There’s no need to dry them first—the moisture helps them trap odors more effectively. Replace them every few days or when the smell returns.

2. Dry Out Wet Shoes and Eliminate Foot Odor

Summer rains often leave shoes damp and smelly. To tackle this, dry used coffee grounds completely, then spread them evenly in a breathable, sealable bag or pouch (like a small cloth sack or old tea bag). Seal it and place the pouch inside each shoe overnight. The grounds will absorb moisture and neutralize odor. If the coffee gets damp again, spread it in the sun to dry and reuse. Refresh the pouches every 7–10 days for best results.

3. Naturally Repel Cockroaches in the Kitchen

Cockroaches thrive in warm, humid kitchens—but they dislike the strong scent of coffee. To deter them, scatter dry used coffee grounds in corners, along baseboards, or near entry points where roaches are active. This method is widely used in restaurant kitchens and can help keep your home pest-free. Reapply as needed, especially after cleaning or if the grounds get damp.

Frequently Asked Questions

Can I use any kind of used coffee grounds for these purposes?

Yes, any leftover coffee grounds from brewing—whether from an espresso, pour-over, or French press—work fine. You don’t need freshly ground beans or a special roast type. Just make sure they’re not moldy or overly burnt.

How often should I replace coffee grounds in the fridge?

Replace them every few days or whenever you notice fridge odors returning. The grounds absorb smells over time and lose effectiveness, so regular replacement keeps your fridge fresh.

Do coffee grounds really keep cockroaches away?

Yes, many commercial kitchens use this method because cockroaches avoid the strong scent of coffee. Spread dry grounds in corners and entry points. Reapply after cleaning or if the grounds get wet.

Can I reuse wet coffee grounds from my shoes?

Yes, if the grounds are only slightly damp, spread them in direct sunlight to dry. Once fully dry, they can be reused in shoes or for other purposes like odor absorption. Avoid reusing grounds that have molded or smell rancid.

Is it safe to leave coffee grounds in the fridge uncovered?

No, for best results place the grounds in a small dish, bowl, or open container. Leaving them completely uncovered may lead to spillage or mess, and won't improve odor absorption.

Recommended FrontStreet Coffee for Home Brewing

For home brewers experimenting with coffee ground hacks, try FrontStreet Coffee’s Ethiopia Huakui for bright floral notes, Yirgacheffe for juicy citrus and stone fruit, or the Classic Blend for a balanced espresso. These single origins highlight the versatility of well-brewed coffee—and their spent grounds work great for deodorizing and pest control. Freshly roasted within 5 days · Orders placed before 17:00 ship the same day · Next-day delivery across most of Guangdong Province.