If there was ever a reason for people to stop "testing", this is a very very good reason. It is causing
people to die of brain cancer, and other issues after continued repeated use, exposing their brains to something
called "Ethylene Oxide", which is used as a medical sterilization agent. (Also known as "[STERILE][EO]" on packaging).
Ethylene Oxide [EO] (in "normal" uses) causes "Chronic (long-term) exposure to ethylene oxide in humans can cause irritation of the eyes, skin, nose, throat, and lungs, and damage tothe brain and nervous system. There also is some evidence linking ethylene oxide exposure to reproductive effects. EPA has concluded that ethylene oxide is carcinogenic to humans by the inhalation route of exposure. Evidence in humans indicates that exposure to ethylene oxide increases the risk of lymphoid cancer and, for females, breast cancer." according to this very official govt document here: https://www.epa.gov/sites/production/files/2016-09/documents/ethylene-oxide.pdf (Of course, not the only one, simply google 'ethylene oxide)....[ Click here for full document ]