The chunks are still 100% usable. You may use them as they are or further season them in a dry space with air flow. I recommend setting them on a piece of cardboard or scrap wood in a green house or on a patio that is warm dry and gets a breeze. Be aware that as they dry they will drip sap which will stain most surfaces.
My wife has a room that she keeps her cactus collection in. It has a ceiling fan to keep the air flowing, it's generally the warmest room in the house, but in the summer, with the AC blowing, even with the vent closed, it's probably about 72-74 in there. Wife lights her cacti with LED lights that don't throw much extra heat.
So, the plan is to lay out the chunks on a two ply sheet of corrugated cardboard, maybe in the center of the room, right under the fan.
Do we think this is a good idea or an invitation to mold, and maybe insect infestation of the cacti?
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