Haha yea its Celcius,
I think you gotta go over 100c to start the decarb process and then I'm pretty sure once the dry stuff is covered in oil or butter or whatever your infusing it stops the decarbing process from happening. Yes you will loose a little potency in the cooking in the oven bit but I don't notice any difference between say a fudge that hasn't been cooked just set in the fridge and the cookies also why cookies are better than cakes coz cakes need 30+mins in the oven where as cookies on 10-+
You should try oil, don't need water and heaps less mess and the infusion is quicker.
Tip. I add 1 teaspoon of lecithin per cup of oil, helps the mixture come together and also helps the body absorb the THC.