Still soft salt dough

[DaffodilField]

After three hours in oven at 100 degrees the back of the salt dough decorations are still wet despite being turned over after two hours. I am not comfortable leaving oven on over night so turned off now. Can I just put them back in tomorrow or will they harden by themselves? Too is totally hard. Is just the back that is soft.

I'd leave them in the oven overnight as it cools, surely they'll be done by morning?

It took a good 3 hours for mine to go hard

I did mine in the microwave.

Microwave them - do it on high but in short bursts otherwise it'll burn.
I usually then stick mine in the airing cupboard for a day or two afterwards just to really dry them completely.