Offsets

I am having problem with the humidity sensor.With the actual offsets as it
is,as the humidity rises the corrected value using the offset goes way off.
My suggestion is to have the offsets increase or decrease exponentially as
an option for those of us having problems with their sensors whether it be humidity,Temp,windspeed etc.
e.g wm918 showing 40% when actual is 70% i.e will need 30% offset
when wm918 shows 70% corrected will show 100% when actual is actually
91%
Thanks