In electronics and optics, swabs are used to clean sensors, lenses, and circuit boards. These require "lint-free" and "anti-static" properties to ensure no microscopic debris is left behind, which could cause catastrophic failure in micro-circuitry.
Commercial users are moving away from plastic stems. The trend is shifting toward biodegradable bamboo and high-density compressed paper sticks. This transition is not just environmental but functional, as paper sticks offer better rigidity for precision tasks.
For commercial laboratories and clinics, DNA-free and sterile swabs are the gold standard. The development of "Flocked Swabs" has revolutionized specimen collection, allowing for higher absorption and better release of biological samples.