Earwax's Slippery-Sticky Combo May Lead to Safer Insect Repellents

Scientists have discovered that earwax, a substance often associated with blockages, has a unique combination of slippery and sticky properties. Researchers led by David Hu and his team observed ants encountering earwax with various properties, finding that smooth earwax made it impossible for ants to scale a surface. In experiments with ants crawling through an earwax-coated tunnel, the substance stuck to the insects, making it difficult for them to move. The team's findings suggest that earwax's dual qualities could be used to develop safer insect repellents. Unlike commonly used forms of pest control, earwax is made of natural materials and has a structure that prevents insects from sticking to it. The porosity of earwax also gives it unique properties, allowing it to absorb twice its weight in water while still clinging to the walls of the ear.