I recently soaked my frog and I think it's a good idea to do because he pooped and he shed when he was soaking.

As far as temps, I used luke warm water in a container, then I placed him in it for about 40 minutes. He shed then he pooped. He actually pooped a massive turd then when I got him out, he pooped again. It seems to be pretty common when you move the frog though that the frog poops.

I hadn't seem him poop in like 2 months every since I fed him the mouse and I started worrying about him, so glad I did it, gonna start doing it monthly and see how it goes.