No, you don't need to reapply thermal paste once the CPU is removed from its socket.
No, you don't need to reapply thermal paste once the CPU is removed from its socket.
I believe OP is suggesting checking the thermal paste if the CPU stays with the cooler on, but even then, you probably can't reinstall it in the socket. If you take off the cooler, it's better to reapply the paste. Leaving the cooler on might not be possible technically, but it’s unlikely you could manage it.
Monitor the temperatures closely
Stay aware of the conditions
Keep track of the readings