Nope. letting it cook longer is actually better. I think most supersoils require 30 days as a minimum. 3 months is great. Would have been better if you had kept it moist or covered well.
Lets get it up and going by slowly bring the moisture level back up. To do this water in 5% water to soil. Use a whetting agent like Saponaria Extract, aloe, or yucca extract. Some gardeners will use a drop or 2 of dawn dish soap into 2 gallons water.
Once you have your water mixed up figure that you want to water it 4 or 5 times.
So as an easy example if we were re-hydrating 40 gallons of soil. I would use 2 gallons of water. First I would mix up the batch of soil to see if you have any moisture in there at all. Then water just enough to get the entire top surface wet. Then let set for 10 min. come back and spray the surface again. rince and repeat until you have used 1 gallon. Then let sit for 30 min. Did you have run off?
Mix your soil. That will tell you how things are looking. If you had some moisture then its proly looking good. If it was all the way dry top to bottom then you will proly want that other gallon. I find the squeeze test to be my preferred method. Get a good handful of your soil and squeeze it in you hand as hard as you can. We want just a couple drops to come out.
