Dampits humidity gauge

[Ruphus]

My question to people who use it: Does yours work?
Mine won´t change its colour at all.
Either I´m having ideal humidity all the time here ( which I somehow doubt ) or that thing doesn´t function while I´m really interested to know how the conditions are being for a newly build guitar that I just obtained.

Suppose I shall better go out and get some reliable indicator, or have you experienced the Dampit thingy to work properly?

Thanks,

Ruphus