microbial contamination or inadequate levels of benzalkonium chloride, a chemical with antimicrobial properties. And some were listed for being purportedly made in facilities that also produced weaker benzalkonium chloride products, or in facilities that also produced methanol-contaminated products.
“After multiple uses, you can start diminishing the effectiveness of the hand sanitizer,” Dr. Matthew Heinz said in an interview with the New York Times. “You really do need to actually wash with soap and water for 20 seconds or more to kind of renew things. You really can’t just apply hand sanitizer 40 times throughout the day and think that you’re good.”