The age-old adage of washing up before dinner has some strong implications when you consider how much bacteria could be hitching a ride on dirty hands. All kinds of nasty illnesses can result from improper hygiene. Way back when before everyone had fancy antibacterial cleaners, soap got the job done. But now that we can simply rub on a hand gel or spray a surface, it begs the question: are we really choosing the right weapon against bacteria?

Microbiologists are beginning to think that antibacterial products don't quite clean as well as traditional methods. In fact, they could be doing more harm than good! These cleaners leave behind residue that can help build resistant bacteria, whereas soap and water do not. Why is this? It's due to the fact that antibacterial products don't kill everything, and the strains of bacteria left over become even stronger.

After the bacteria become tolerant of these cleaners, cross-resistance is possible. This means they start putting up all kinds of defenses, including protection against other things like antibiotics. One example they discovered was for a compound found in many hand and wash cleaners. Prolonged exposure to this common antibacterial cleaner caused mutations in the bacteria. Not only did they become stronger, but they somehow built a resistance to an antibiotic used to treat tuberculosis. While this has only been shown in labs, the potential is there in the home. If you're a healthy individual, experts suggest sticking with soap. However some people with lesser immune systems may have to rely on antibacterial products.