What is aluminum foil on door knob?

Aluminum foil on door knobs is sometimes used as a makeshift barrier against static electricity or as a means of keeping pathogens from spreading. It is believed that the aluminum in the foil can help to discharge any static buildup on the doorknob, thus reducing the risk of an electrical shock. Additionally, some people may use aluminum foil as a way to prevent the spread of germs or viruses, by creating a barrier that can be discarded after use. While there is no scientific evidence to support these claims, some people find that using aluminum foil in this way provides some peace of mind. However, it is important to note that aluminum foil may not be an effective barrier against all pathogens and should not be relied upon as a substitute for regular hand washing and hygiene practices.