First mistake was the 30 gallons tank, the second is the 100 gallons tank, if you keep your hatchling in those you will FAIL.
I would downgrade asap in something no bigger that a 6 to 12 quarts tub, (stress + health issue can be a bad combination) if the animal is under is under 200 grams use a 6 quarts tub, the 30 gallons tank will be perfect when he is an adult the other one will be nearly impossible to maintain temp wise.
When you say iodine please tell me you mean pividone or betadine, and are not using pure iodine which would be like pouring salt on a wound?
You want your animal healthy I would suggest based on the description to take you snake to a QUALIFIED herp vet to be assessed, in some cases anti-biotics maybe required additionally you will likely be prescribed silver sulfadiazine.
UNPLUG your UTH, get a thermometer get a thermostat and please READ the caresheet you will find here.