How does 70 isopropanol works on bacteria?

Here is a great website to check out for more description about how alcohols kill bacteria... http://www.byedr.com/medicine/4075-byedr-1.html Basically, the alcohol causes the proteins of the bacteria to denature and coagulate. This is a lethal event. Interestingly, solutions that are mixed with water (ie 60-70% isopropanol or ethanol) are more effective at killing bacteria that 100% alcohol. This is because the water helps the alcohol permeate into the bacteria better where it can do it's killing action...