I'm currently using it to humidify, but it clicks the bank too soon, resulting in a lot of wasted time. If there is a small delay when banking after casting humidify, then it will bank at the right time. When I do it, I can click the bank as soon as the lightning appears in the clouds over my head.
When humidifying you also don't need to see the inventory at all, so it would be faster just to have it stay on the magic page.