It looks like your substrate is pretty dried up because it's shrinking away from the side.
I would soak it for a few hours, submerged with a clean heavy surface under clean water, to rehydrate the mycelium and prepare it for a heavy fruiting.
I would soak it for a few hours, submerged with a clean heavy surface under clean water, to rehydrate the mycelium and prepare it for a heavy fruiting.