Cleaning your PC with expired isopropyl alcohol can be risky — here's why
Think twice before grabbing that old bottle. Here's why expired isopropyl alcohol can harm your PC and how to clean it the safe way instead.
Even if you keep your computer in a dusty environment, a bottle of isopropyl alcohol sitting in your cabinet may not be the safest choice for cleaning. While this substance is often recommended for cleaning electronics like phone screens, an expired bottle can pose risks to your computer. Isopropyl alcohol generally retains peak quality for about three years after production, but using a bottle that's been around for a decade might not be advisable.
The alcohol content in an aged bottle can change due to evaporation and absorption of moisture, making it less effective and more risky for sensitive computer components. The ideal concentration for electronics cleaning is between 90 and 99 percent alcohol, with minimal water content. However, over time, isopropyl alcohol can become hygroscopic, meaning it absorbs moisture from the surrounding environment, potentially diluting the alcohol content.
If the bottle has been sitting for a long time, the alcohol may have absorbed enough moisture to reach roughly 65 percent alcohol and 35 percent water, rendering it potentially unsafe for use. In addition to alcohol concentration, the type of surface you're cleaning also matters. While isopropyl alcohol can be effective for cleaning sticky thermal paste, it's not suitable for all parts of your PC.
It can potentially cloud or dull certain finishes, and it may even damage rubber seals and gaskets over time. For these reasons, it's advisable to use compressed air and a microfiber cloth for general cleaning, or to rinse water-sensitive parts like dust filters with water, ensuring they're thoroughly dry afterward.
Written by urgent.news from Engadget's reporting — not their text. Machine-written — may contain errors; check the original before relying on it.
