For outdoor enthusiasts, an old toothbrush is invaluable for maintaining gear. Use it to clean bike chains by applying a degreaser and scrubbing away built-up grime. Similarly, you can use a toothbrush to clean garden tools, removing dirt and rust. For camping gear, such as tent zippers or hiking boots, a toothbrush can help remove mud and debris, ensuring your equipment remains in good condition and ready for your next adventure.
8. Make a Pet Grooming and Paw-Cleaning Brush

Pets often bring dirt into the house on their paws, and an old toothbrush can help keep them clean. Use a toothbrush to gently brush dirt and debris from between your pet’s paw pads after walks. You can also use it for grooming, especially for small pets like rabbits or guinea pigs, where a soft-bristled toothbrush can help untangle fur and remove loose hair without causing discomfort.
9. Turn It Into a Craft, Paint, and Stain Detail Brush

Crafters and artists can repurpose old toothbrushes as detail brushes for painting and staining projects. The stiff bristles are perfect for adding texture or for splattering paint in a controlled manner. Use them for applying glue or varnish in small, precise areas. When working with wood stains, a toothbrush can help apply finishes to carved details or intricate designs, ensuring an even and thorough application.
10. Keep One in Your Cleaning Kit for Stains, Seals, and Fixtures

An old toothbrush is a versatile addition to any cleaning kit. Use it to tackle tough stains on fabrics or carpets by applying a stain remover and gently scrubbing the area. For bathroom and kitchen seals, such as those around sinks and tubs, a toothbrush can help remove mold and mildew. Additionally, the toothbrush is perfect for cleaning fixtures, such as faucets and shower heads, where its small size allows it to reach and clean effectively.