digest
Short Summary
Main recommendation: Dry your hands with a paper towel rather than an air dryer, and if you use paper towels, use the shake-fold-wipe method with only one sheet. Washing properly with soap removes nearly all bacteria regardless of drying method, but drying speed and friction make paper towels the more effective choice for removing remaining moisture and contaminants.
Key Points
- Hand drying matters most when handwashing is poor or water-only, since wet skin spreads bacteria more easily.
- Air dryers took about 45 seconds to remove 97% of hand moisture, while paper towels achieved the same in about 10 seconds.
- In observed behavior, people used air dryers for only about 22 seconds, leaving hands under 70% dry, while paper towel users reached over 85% dryness in about 5 seconds.
- Friction helps remove bacteria, and much of it transfers onto the paper towel.
- Some studies suggest hand dryers may emit bacteria from contaminated bathroom air.
Details Worth Noting
- Concrete instructions: After washing your hands with soap, shake them hard 12 times, fold a single sheet of paper towel in half, and wipe your hands with it. The video describes this as the optimal way to dry with the least paper.
- If you must use an air dryer, dry your hands fully, since the video says that makes it a much smaller problem; some dryers perform better than others.
- Environmental trade-off: about 13 billion pounds of paper towels are used every year in America alone, which the video calls paper towels' major pitfall; the video says new dryers are the more environmentally friendly option overall, using less energy and having lower carbon emissions.
- The video cites that about 80% of infectious diseases are spread by hands, which is why washing matters.
- The video credits advocate Joe Smith for the shake-and-fold tip.
Bottom Line
Paper towels dry hands faster and more thoroughly and remove more bacteria through friction, but they generate more waste, so use a single folded sheet with the shake-fold-wipe method to balance hygiene and environmental impact.
