Once every few days my mom always wipes down cell phones , remote controls, refrigerator handles, etc. with 70 percent isopropyl alcohol (rubbing alcohol)

I always cleaned my cell phone screen with it.   Does it actually kill germs?

11 minutes ago, Anopsology said:

Once every few days my mom always wipes down cell phones , remote controls, refrigerator handles, etc. with 70 percent isopropyl alcohol (rubbing alcohol)

I always cleaned my cell phone screen with it.   Does it actually kill germs?

Yes. It deactivates some bacteria and viruses by denaturing their outer membrane. I always have it around because it''s the most smear-free cleaner.

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Isopropyl alcohol, particularly in solutions between 60% and 90% alcohol and 10 – 40% purified water, is rapidly antimicrobial against bacteria, fungi, and viruses. Once alcohol concentrations drop below 50%, usefulness for disinfection drops sharply. Notably, higher concentrations of alcohol don’t generate more desirable bactericidal, virucidal, or fungicidal properties.

The presence of water is a crucial factor in destroying or inhibiting the growth of pathogenic microorganisms with isopropyl alcohol. Water acts as a catalyst and plays a key role in denaturing the proteins of vegetative cell membranes. 70% IPA solutions penetrate the cell wall more completely which permeates the entire cell, coagulates all proteins, and therefore the microorganism dies. Extra water content slows evaporation, therefore increasing surface contact time and enhancing effectiveness. Isopropyl alcohol concentrations over 91% coagulate proteins instantly. Consequently, a protective layer is created which protects other proteins from further coagulation. Solutions > 91% IPA may kill some bacteria, but require longer contact times for disinfection, and enable spores to lie in a dormant state without being killed. A 50% isopropyl alcohol solution kills Staphylococcus Aureus in less than 10 seconds, yet a 90% solution with a contact time of over two hours is ineffective. Some disinfectants will kill spores with exposures times that exceed 3-12 hours, which are classified as chemical sterilants. So why do higher alcohol solutions yield fewer results for bactericidal and antimicrobial outcomes?

https://blog.gotopac.com/2017/05/15/why-is-70-isopropyl-alcohol-ipa-a-better-disinfectant-than-99-isopropanol-and-what-is-ipa-used-for/