Also you can just keep it going. An hour usually does the trick for me, but occasionally I'll extend it for another 30 mins. I wouldn't be surprised if that still uses less energy than just 30 mins high.

Plus, I wouldn't be surprised if the times I do extend it aren't necessary. Like it's not even at the damp point, it's just at the point where it's ambiguous if they still have a bunch of moisture and have been fine when I decide to just take them out.

Which is another good sign for drying on low: it doesn't matter if there isn't any more moisture to evaporate, they are just being warmed instead of cooked.