# Cleaning and maintenance of Sky unit

**URL:** <https://community.tempest.earth/t/cleaning-and-maintenance-of-sky-unit/2428>\
**Category:** Tempest Owners\
**Tags:** sky\
**Created:** [October 5, 2018, 1:02pm UTC](https://community.tempest.earth/t/cleaning-and-maintenance-of-sky-unit/2428 "2018-10-05T13:02:01Z")\
**Posts on this page:** 1\
**Showing post:** 11

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**Author:** ![iladyman](https://sea2.discourse-cdn.com/flex020/user_avatar/community.tempest.earth/iladyman/32/2305_2.png) [@iladyman](https://community.tempest.earth/u/iladyman)\
**Post date:** [March 3, 2020, 8:50am UTC](https://community.tempest.earth/t/cleaning-and-maintenance-of-sky-unit/2428/11 "2020-03-03T08:50:44Z")

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Hi @WFsupport,

How should we clean the special coating under the sonic transducers?  
This is a photo of my Sky #4834 after 52 days outside after some gentle rain:

 ![IMG_2743](https://us1.discourse-cdn.com/flex020/uploads/sws/original/2X/2/28a7a00e46ded7dc3abb42a5132eadd0c41a646e.jpeg)

This is a video squirting water across it trying to clean it:

[![](https://img.youtube.com/vi/sNtFl7CSpHI/maxresdefault.jpg "Weatherflow Smartweather 'Sky' Cleaning the wind gap of the ultrasonic anemometer.") ](https://www.youtube.com/watch?v=sNtFl7CSpHI)

This is a photo after the squirting:

 ![IMG_2744](https://us1.discourse-cdn.com/flex020/uploads/sws/original/2X/4/43314375dd6368b642f0342f06ac67c34aa66078.jpeg)

And after a gentle horizontal shake trying to remove the droplets:

 ![IMG_2747](https://us1.discourse-cdn.com/flex020/uploads/sws/original/2X/e/eaa820e771d901de5a32f0ca9a38d165fda67679.jpeg)

It appears to me that the special coating was either inconsistent or might be wearing off causing the puddle?

I have not touched any of the surfaces inside the gap and this squirt of water is the first time I have tried it.

Wondering what else I can do?  
cheers Ian 🙂

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_[View the full topic](https://community.tempest.earth/t/cleaning-and-maintenance-of-sky-unit/2428)._