Compost went cold
I started two batches of compost in a 2 chamber barrel composter. It heated up for about two days, long enough for blades of green grass to look like straw. Some whitish, ash looking thin layers formed.
The green portion was grass clippings. To grass clippings, I added a few shovels of finished compost, mulched dead leaves and compost starter. It has the right amount of moisture. Presently, both chambers are cold Is there a way to restart the composting process?