A closer look

Fungal spores absolutely love dark, damp environments, making your sweaty sneakers a luxurious five-star resort. Once they aggressively establish a colony under the nail bed, they mercilessly feed on the tough keratin proteins, turning the previously solid structure yellow, crumbly, and horrifyingly thick. It is incredibly hard to evict them because they entrench themselves deep into the biological armor, violently refusing to leave.