# Will Engine Cleaner Ignite If Sprayed on a Hot Engine? **URL:** \ **Category:** Factual Questions\ **Created:** [October 5, 2023, 1:31am UTC](https://boards.straightdope.com/t/will-engine-cleaner-ignite-if-sprayed-on-a-hot-engine/991127 "2023-10-05T01:31:06Z")\ **Posts on this page:** 1\ **Showing post:** 11
**Author:** ![swampspruce](https://sea3.discourse-cdn.com/straightdope/user_avatar/boards.straightdope.com/swampspruce/32/261_2.png) [@swampspruce](https://boards.straightdope.com/u/swampspruce)\ **Post date:** [October 5, 2023, 8:51pm UTC](https://boards.straightdope.com/t/will-engine-cleaner-ignite-if-sprayed-on-a-hot-engine/991127/11 "2023-10-05T20:51:03Z")
As someone who has sprayed engine cleaner on a hot engine I can tell you that yes, in fact, it WILL catch fire. I posted about it here several years ago ,( OMG 10 years ago!!!) For your reading enjoyment, my dumb assery. > [@Instructions You Say? Pffft!](https://boards.straightdope.com/t/instructions-you-say-pffft/668500/1): > > Up until recently, I never really understood why items like toothpicks and Q-tips came with instructions. When I originally read Hitchhikers Guide to the Galaxy Trilogy and came across the toothpicks thing I didn’t believe it, so I checked and sure enough, there were instructions on how to use tooth picks. How could anyone be so dumb as to not understand how to use something that has the instructions in the name? With age comes wisdom; someone, somewhere has stuck a toothpick in their gums, or … --- _[View the full topic](https://boards.straightdope.com/t/will-engine-cleaner-ignite-if-sprayed-on-a-hot-engine/991127)._