1. Clean the computer monitor with anhydrous alcohol
Generally speaking, alcohol is a commonly used organic solvent that can dissolve some dirt that is not easy to wipe. If it's just used to clean the display casing, there's no bad effect.
But be sure not to use alcohol to clean the monitor screen. Because now some of the more high-end monitors are coated with a special coating on the screen, so that the display has a better display effect. Once you use alcohol to wipe the monitor screen, this special coating will dissolve, causing a bad effect on the display.
2. Clean the optical drive laser head with anhydrous alcohol
Different laser heads, the materials used are also different, for a part of the optical drive, the laser head objective part of the use of a similar plexiglass material. If you use alcohol to wipe it, alcohol dissolves its surface, making it opaque and completely damaging the optical drive's laser head.