> For the complete documentation index, see [llms.txt](https://emotiv.gitbook.io/flex-2.0-user-manual/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://emotiv.gitbook.io/flex-2.0-user-manual/cleaning/cleaning-gel-sensors.md).

# Cleaning Gel Sensors

After you’ve finished your experiment, you must clean the sensors immediately. Clean the sensors quickly by rinsing them under a running tap to remove the gel residue. If you do not remove the gel from the sensors, it can harden, impeding the quality of the EEG signals for your next experiment. 

If the gel does dry out:

* Soak the sensors in water for 30 seconds. Then rinse again or scrub gently with a soft toothbrush.
* If the gel is difficult to remove, try soaking the sensors in water with a mild detergent (such as children’s shampoo). After soaking, rinse the sensors under a running tap and dry the sensors with a towel or tissue.

**WARNING**

**Do not** soak the gel sensors in saline solution or chloride. Doing this will corrode the sensors. 

**Do not** use an autoclave or other hot sterilization methods, as this can damage the wire insulation. 

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