Calcium Chloride Desiccant trun to gel after absorbing moisture, when you touch it like soft-gel like.
Then the desiccant should be replaced.
Silica gel: indicating type: when color change, then these silica gel bags/sachets should be replaced. Non indicating: tear a bag and put these desiccant beads into water, if it does not "bomb", then the bags should be replaced.
Clay or mineral desiccant: a piece of HIC should be used together.