Which of the following methods is used to reduce the number of bacteria on surfaces?

Disinfecting is the method specifically designed to eliminate or reduce the number of bacteria and other pathogens on surfaces. This process involves the use of chemical agents known as disinfectants that are effective against a wide range of microorganisms. Disinfecting is essential in barbershops and similar settings to maintain a safe and hygienic environment, particularly in areas where tools and surfaces may come into contact with skin or bodily fluids.

While sterilization is an even more rigorous process that can eliminate all forms of microbial life, including spores, it is not always necessary for all surfaces in a barbershop context. Cleansing generally refers to the removal of dirt and debris but does not necessarily kill bacteria or viruses. Sanitization often refers to reducing microorganisms to safe levels as determined by public health standards, but it is not as targeted or effective as disinfecting in reducing harmful pathogens immediately.