First I want to point out that I am not a chemist, sorry for bad description.
I have CO2 incubator. CO2 concentration is 10-20% and the humidity level is around 90%. I was using a humidity sensor to measure humidity and some kind of transparent substance have formed around the sensor. Sensor becomes unprecise and had a slow response time. Substance almost looks like plexiglass.
Is it possible that carbonic acid which is forming from CO2+H20 -> H2CO3 is somehow reacting with integrated circuit case or sensor and forming some kind of glass-like substance?