english: Because they're designed to wash away harmful substances, or particles, they're released in much larger amounts, and their aqueous layer contains more antibodies to stop any microorganisms that may be trying to get in, as well.
non_english: Ze zijn ontworpen om schadelijke stoffen of deeltjes weg te spoelen. Ze worden in veel grotere getale vrijgegeven en hun waterlaag bevat meer antilichamen om binnendringende micro-organismen  tegen te houden.