Well thats the problem i have, is the icebath "really" at exactly 0,0, atleast i hope so but it could be at 0,4 and the sensor was right from the start
pottasium chloride for 84/85%
magnesium chloride for 33%
The bosch bsec library can take a temp offset i just feed it to the library, but i could try a 2 point mapping of the offset and always update the value to the library
but im also wondering why the bsec library cant take humidity values or maybe i missing something