Start a fire
Dryer lint is flammable, which is why we’re urged to clean out the trap after each load of laundry. Collect it in a sealed jar to use as tinder the next time you start a fire in your backyard fire pit. For a self-contained fire starter, stuff cardboard toilet paper rolls with lint.
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Use as mulch
You can add dryer lint as a mulch around potted plants as long as you’re not using dryer sheets, which may leave an unwanted chemical residue.
Prevent erosion
When spread out and dampened with water, dryer lint can form a barrier to protect soil from erosion. If you don’t like the look of soggy lint, use the lint as an under-layer and cover with decorative stones.