Putting the device in a hygroscopic area is what matters. Sometime a dry, ventilated area is enough, but putting it in rice or some chemical product ( the stuff you find in packaging ) Also woodshavings can be used, as long as the surrounding temperature is high ( and preferably dry ) enough

The choice for rice is mostly made because of availbility en cheap price. And the tiny Chinese men who com to repair the device like to eat the rice better then woodshavings.

and to be somewhat more serious ( first half ) https://www.sciencedirect.com/topics/engineering/hygroscopic-material