The value does not fall below 200 about esp8266-vindriktning-particle-sensor

[hb020]

Vacuum is not enough. I found that you need to regularly dismantle the sensor completely, and blow compressed air through the sensor (I used 3 bar, probably overkill).
This is how far I dismantle it (just unscrew everything, no need to desolder or cut glue):

But even that no longer works lately. Trying ultrasound cleaning now.
And even then, it takes some time (have seen 12 hours) for the values to drop. It seems to have some memory.

[hmax42]

i had a similar problem, but i solved it by power cycling the unit
#43 (comment)

[tiimsvk]

The complete disassembly and cleaning of the sensor also helped me. Subsequently, with the passage of time, I restarted the sensor twice.
Now, after 2 weeks, the data is still fine

[hmax42]

and again i powercycled my units, see the graph from one of them: