Our basement is somewhat humid so we do use dessicant. We use packets that change color when they absorb moisture [1] and they change color pretty rapidly, even in the airtight container. I keep meaning to rotate them for fresh packets regularly, but I think I've only done that once. The dessicant I've linked can be dehumidified in the oven, so it's possible to rotate and reuse them repeatedly.

[1] https://dryndry.com/products/5-gram-aiwa-orange-indicating-p...