I bought a very heavy cast Iron sink for $10 to use as a forge, due to the lack of 55 gallon drums at the time. I hooked up the blower pipe, and raised the bottom of the sink with clay I dug up and washed. It's been about 2 days, and the clay is still wet. Can I use the forge wet, or should I wait for it to dry, and how long should it take? Any tips for speeding the drying process?