I read this answer which raises the question of what happens to the silica gel used in the ISS once it has absorbed humidity.

The ISS relies on silica gel to absorb humidity from the atmosphere to make it easier to remove excess CO2.

Is this silica gel replaced when it can't absorb any more humidity, with new silica gel being sent to the ISS from Earth along with other consumables? If so how often is it replaced?

Or is the silica gel recycled and reused? If so, how is the recycling done and how many times can it be recycled?