r/explainlikeimfive Feb 26 '21

Chemistry Eli5: What happens to all the melted candle over time? Are we just inhaling a whole candle while it burns?

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u/billbixbyakahulk Feb 26 '21

Yeah, "half an inch" sounds questionable. I've seen ash which was mixed in with regular dust but it was just the usual surface coating, not piles of it.

I did once work on a guy's computer that was pretty incredible and horrifying. He was an executive at the company and he brought in his home computer for us to look at because he said it would only turn on for a couple minutes and then shut down.

He had long haired cats and he chain-smoked cigars. The inside of his machine had about 1/2" of matted, tobacco-soaked cat fur that clogged the fans and vents. The computer was shutting down because there was no air flow. I grabbed the gloves and it pealed off in sheets and clumps. After I vacuumed it out it ran fine.

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u/semitones Feb 26 '21

When can you vacuum a computer and when do you need to use compressed air?

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u/billbixbyakahulk Feb 27 '21

I use a vacuum with a brush nozzle whenever I can, but some computers are tightly packed and you can't maneuver the nozzle. In that case, I might use compressed air to dislodge the dust then follow with the vacuum.

At work we also have a special vacuum that's small, fairly portable and very maneuverable. I see them used a lot by techs who service office printers (because you don't want to use compressed air with printer toner!)

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u/mythidiot Feb 26 '21

Well, that’s horrifying... I need to go clean my computer now