Soap vs. Liquid Soap: Why Solid Soap is Surprisingly More Hygienic

More and more people are using solid hand soap to keep their hands clean, but is it really the most hygienic option?

Solid soap is often praised for being economical and environmentally friendly because it lasts longer and uses less water, but how does it compare with liquid soap in terms of hygiene?

If the coronavirus pandemic taught us anything, it is that hand hygiene is essential for preventing the spread of germs. Regular handwashing with soap effectively removes bacteria, viruses, and other harmful microorganisms, helping to prevent infections and safeguard health. So, which type of soap, bar or liquid, is better for maintaining optimal hand hygiene?

Despite common misconceptions, solid soap is not necessarily a bacterial hotspot. While bars of soap do have a moist surface that can harbor germs, these germs typically don't survive long due to the harsh conditions. According to Ernst Tabori, Director of the German Consulting Center for Hygiene (BZH) in Freiburg, "Soap is an alkaline medium that bacteria and viruses, except for a few exotic ones, generally dislike."

Interestingly, liquid soap may actually harbor more bacteria than bar soap. Tabori notes that bacteria can accumulate in soap dispensers because of the pump mechanism. However, there's no need to worry, both the germs on soap bars and in dispensers can be easily washed away. Just lather your hands thoroughly and rinse under running water to remove any germs.

Whether you use solid or liquid soap, proper handwashing is crucial. Lather your hands for at least 20 seconds and then dry them with a clean towel. The Robert Koch Institute (RKI) suggests that additional disinfectants or antimicrobial additives are unnecessary.

Frequent handwashing can be tough on the skin, potentially leading to dryness or hand eczema. To counteract this, apply a moisturizing cream after washing to keep your skin nourished and hydrated. Products with glycerin or sheet butter are the best for your skin. Additionally, when you're drying your hands, it is best to pat them dry instead of rubbing. When possible, avoid harsh chemicals and alcohol based sanitisers when which possible which damage and dry out your skin.