3. Create a natural insect repellant
Coffee has a smell that deters lots of bugs, like ants, mosquitos, and more. Sprinkle some grounds on areas of your house you’re trying to keep bug-free (around doors, cracks in walls), or—if you're out of bug spray and don’t mind looking like you just rolled around in dirt—rub a light coating on yourself.
4. Make your own air freshener
Storing coffee grounds in a breathable fabric container can absorb odors in the air, or even in your refrigerator. Perfect for masking the three-week-old Chinese food leftovers that have been marinating in the back.
5. Coat your sidewalks in the winter Instead of paying for street salt, you can use coffee grounds to get more traction on icy walkways.