# What do I do if one of my channels is downgraded, reporting high, not working, or spikes erratically?

**URL:** <https://community.purpleair.com/t/what-do-i-do-if-one-of-my-channels-is-downgraded-reporting-high-not-working-or-spikes-erratically/842>\
**Category:** Sensors\
**Created:** [June 4, 2022, 6:20pm UTC](https://community.purpleair.com/t/what-do-i-do-if-one-of-my-channels-is-downgraded-reporting-high-not-working-or-spikes-erratically/842 "2022-06-04T18:20:13Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![PurpleAir](https://sea2.discourse-cdn.com/flex020/user_avatar/community.purpleair.com/purpleair/32/176_2.png) [@PurpleAir](https://community.purpleair.com/u/PurpleAir)\
**Post date:** [June 4, 2022, 6:20pm UTC](https://community.purpleair.com/t/what-do-i-do-if-one-of-my-channels-is-downgraded-reporting-high-not-working-or-spikes-erratically/842/1 "2022-06-04T18:20:13Z")

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If you notice one of your channels is downgraded, reading high, not working, or a channel spikes erratically, it is possible that some debris, an insect, or spider got into one of the laser counters in your sensor. View the [Sensor Maintenance](https://community.purpleair.com/t/sensor-maintenance/1531) article for cleaning techniques and laser counter replacement.

Learn more about [downgraded channels](https://community.purpleair.com/t/q-what-does-downgraded-mean-on-the-graph/821).