# Cleaning your PC with expired isopropyl alcohol can be risky — here’s why

- URL: https://talkfuse.com/story/cleaning-your-pc-with-expired-isopropyl-alcohol-can-be-risky-heres-why/
- Published: 2026-11-07T15:45:00+00:00
- Updated: 2026-11-07T16:03:33+00:00
- Original publisher: Engadget
- Original article: https://www.engadget.com/2305456/why-isopropyl-alcohol-degrades-pc-cleaning/
- Topics: Gadgets

## Key points

- Old isopropyl alcohol may absorb water and evaporate more slowly.
- Use 90 to 99 per cent alcohol on suitable components.
- Avoid it on delicate plastics, finishes and rubber seals.

## Summary

Isopropyl alcohol can clean some PC components, but an old bottle may contain more water than when it was bought, making it riskier for sensitive electronics. The story explains that the alcohol absorbs moisture over time, even through small gaps in a closed cap, so age and storage can affect how quickly it evaporates.

A typical safe range for electronics cleaning is 90 to 99 per cent alcohol, and peak quality is often around three years after manufacture, depending on the brand. Alcohol can also damage acrylic or polycarbonate, dull finishes and dry out rubber seals; compressed air and a microfibre cloth are better for many delicate surfaces.

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Summarised by TalkFuse (https://talkfuse.com/). Quote the original publisher for the reporting and link this page for the summary and discussion.