Years ago when I worked for a vet, we had baytril. It's a safe drug for animals if used at the right dosings. I wouldn't think twice for my animals using it if needed. Just make sure he is reputable vet that has experience with reptiles.
I suggest calling a few vets that specialize with...
If it was me I wouldn't. I would use some mild soap and rinse off with some warm wet towels. But let the pros give you advise. I'm new to the Cham world. I do that with my 3x3x4 ft iguana cage.
Looking back at my Navy career... Stationed in Japan for 7 years... Then off to BUDS.. Round two at BUDS... Made it as a SEAL, a few tours I afghan... Soooo close to not making it out alive... I'm beyond lucky to carry on!! 3" and I would have been another stat for the afghan war...
I'm in the same situation. Just received my 2x2x4 ft cage today. Picked up an 18 inch ficus and a 2 foot Umbrella plant. Would love to have something else with a little more sturdier limbs.
Good luck and keep us updated on yor build!!