# Backwash in beer

**URL:** https://boards.straightdope.com/t/backwash-in-beer/50586
**Category:** Factual Questions
**Created:** [January 17, 2001, 11:26pm UTC](https://boards.straightdope.com/t/backwash-in-beer/50586 "2001-01-17T23:26:52Z")
**Posts on this page:** 4
**Page:** 1

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### Author: ![El\_Zagna](https://avatars.discourse-cdn.com/v4/letter/e/d2c977/32.png) [@El\_Zagna](https://boards.straightdope.com/u/El_Zagna)
#### Post date: [January 17, 2001, 11:26pm UTC](https://boards.straightdope.com/t/backwash-in-beer/50586/1 "2001-01-17T23:26:52Z")

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How much backwash (saliva) is there in the last few swallows of beer (or anything else)? My guess is that there is very little.

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### Author: ![SmackFu](https://avatars.discourse-cdn.com/v4/letter/s/53a042/32.png) [@SmackFu](https://boards.straightdope.com/u/SmackFu)
#### Post date: [January 18, 2001, 1:21am UTC](https://boards.straightdope.com/t/backwash-in-beer/50586/2 "2001-01-18T01:21:09Z")

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You might be interested in [this old thread](http://boards.straightdope.com/sdmb/showthread.php?threadid=34524) about “why the last sip of beer tastes so nasty”.

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### Author: ![Dignan](https://avatars.discourse-cdn.com/v4/letter/d/f07891/32.png) [@Dignan](https://boards.straightdope.com/u/Dignan)
#### Post date: [January 18, 2001, 2:02am UTC](https://boards.straightdope.com/t/backwash-in-beer/50586/3 "2001-01-18T02:02:59Z")

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I’ve heard that the last 10% of _any_ drink is just backwash.

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### Author: ![El\_Zagna](https://avatars.discourse-cdn.com/v4/letter/e/d2c977/32.png) [@El\_Zagna](https://boards.straightdope.com/u/El_Zagna)
#### Post date: [January 18, 2001, 12:29pm UTC](https://boards.straightdope.com/t/backwash-in-beer/50586/4 "2001-01-18T12:29:24Z")

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Yeah, that’s what I have HEARD but I don’t believe it.