It’s melting, so why not put our cocoa sweet in the fridge? NOOOON, don’t! It could absorb the odours of whatever is in your fridge.
Unfortunately, in hot weather, you have no choice! Before putting it in the fridge, wrap it up to protect it from odours and condensation, then seal it in an airtight container. When you take the chocolate out of the fridge, let it come to room temperature before unwrapping it.