# Dirty internal mirrors

**URL:** <https://forum.formlabs.com/t/dirty-internal-mirrors/15271>\
**Category:** Support & Troubleshooting\
**Created:** [October 3, 2017, 7:39pm UTC](https://forum.formlabs.com/t/dirty-internal-mirrors/15271 "2017-10-03T19:39:47Z")\
**Posts on this page:** 1\
**Showing post:** 4

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**Author:** ![shake128](https://sea1.discourse-cdn.com/flex025/user_avatar/forum.formlabs.com/shake128/32/10678_2.png) [@shake128](https://forum.formlabs.com/u/shake128)\
**Post date:** [October 4, 2017, 9:20am UTC](https://forum.formlabs.com/t/dirty-internal-mirrors/15271/4 "2017-10-04T09:20:29Z")

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there is an identical post here. you will find more info if you need. (the procedure must be authorized or you lose warranty) [Particles on the main mirror. pro service plan not answering. anyone knows where to find instructions on how to clean the mirror?](http://forum.formlabs.com/t/particles-on-the-main-mirror-pro-service-plan-not-answering-anyone-knows-where-to-find-instructions-on-how-to-clean-the-mirror/15013/25)

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