I've been using an ice bath to cool my wort that's boiled in a big pot. After 30 mins the wort temp in the bath is usually 20 degrees Celsius. After I transfer it to the fermenter though it's reading 30. I'm not quite sure what I can do now to cool it back to at least 23 so I can pitch the yeast.
Any ideas? And why is the temp so different after transferring? I took readings from all over the pot to ensure it was cool enough.