Hi RainerS,
I located in China.
As the HSMI document description, user should avoid to use the sensor in below chemicals environment which can damage the sensor permanently.
Also, as our previous experience, 'the sensor communication is ok and at same time the sensor performance is not good', maybe caused by contamination.
You can continue to observe replaced sensor, update if it is abnormal.
By the way, where did you buy BME280?
... View more