Experts say it is better to use less when at home. Otherwise the good bacteria in the palms will be killed. That god bacteria actually help to keep our body healthy but using good doses of sanitizer also kills the good bacteria. So the sanitizer should be used as long as necessary. Excessive use can also lead to damage Experts warn that if you become too addicted to sanitizer, viruses and germs may also increase their immunity. Experts also say that you should use sanitizer only when your hands are dirty and sticky.