As Jerry said, balls don't need a cool down time to breed successfully.

I personally don't cool. I keep the hotspots the same year round. Only the ambient temps in the room rise and drop depending on the seasonal change.
Dropping temps seems like an unnecessary extra step that could potentially result in RIs. There are people who have successfully cooled without RIs, but there are enough to sway me not to cool.

Its all personal preference and what works with you.

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