i would increase soaks just to be on the safe side. it does not hurt to do it.
did they give you de-worming stuff ?
he might soak or be near the water when you are not around him.
I alaways mist my iguana she loves it. i give soaks too.

my first iguana was really mellow i miss it
i adopted my second one shes a hand full but i love her

good luck ! i wish you the best of luck
if you got questions or i missed any i will try to help you to the best of my ability.

christina