The warm temp may have something to do with it. IME, cotes does not create a pellicle. Check the gravity, see if it's finished, transfer to cold under the pellicle, serve.
This section allows you to view all posts made by this member. Note that you can only see posts made in areas you currently have access to.
The oak I got was a raw white oak board from a specialty lumber shop, not a big box place. It was untreated.
I don't use it directly in beer, I soak it in liquor and then use the liquor itself. it takes the guess work out of adding it.
i usually have US-05, S-04, and 71B on hand.