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I bet 99% of the members of this forum know that nearly every product sold to clean computers and their screens is nothing more than relabeled isopropyl alcohol. Alcohol is a good cleaning agent, but I wanted to pass along a tip that we discovered at work, where we clean hundreds of computers a day. The highest percentage of alcohol that should be used on computers, TVs, monitors or screens is 70%. It would seem like 99% would clean better, but actually, it poses a risk. We found that 99% alcohol, if not wiped off immediately, begins to etch into the plastic computer body. It's too strong for general cleaning. It might be fine for glass but not computers, TVs or their screens and monitors.