Dig the succulent out of the soil and remove excess soil stuck to the roots, cut off any brown/black roots as these are rotten already. Leave the plant on a mesh or any kind of strainer till the roots have air dried from anywhere two to three days. When the roots are dry completely, plant them back in the pot.
Likewise, can you revive a rotting succulent?
Yes. Majority of the time an overwatered plant do bounce back with proper care and treatment. And even if the plant has succumbed to rot, some parts of it can still be saved. A leaf or a small stem can be saved and propagated to start a new plant.
In this way, why are my succulents shriveling up and dying?
The reason succulent leaves shrivel is because they are either over watered or under watered. Succulents need the soil to dry out between bouts of watering. If the soil is damp the stress causes the leaves to shrivel turn yellow and mushy. Under watering causes succulents to shrivel and turn brown.