YES!! Keep the humidity up in the top of his range. I'd try and mist a little more often, like 5 times per day. My panther had an URI when she was 3 or 4 months. I ended up having to hand feed her for a while. I'm not trying to discourage you though!! If you have any ?s you can email me... I don't know much, but I know some about this!!
Raise the basking temp up. What is it at right now? Try and have it up around 90-95. I know.. it sounds high, but it will help keep the infection from getting worse, and speed up healing. Just keep an eye on him. If he turn white while basking then it's too hot. I think I had my panther's around 92*.
Also, make sure he is drinking lots. Baytril can take a toll on the organs. Watch his poo also to make sure he's drinking enough.
Finally, watch his food intake. (I can't remeber if you said anything about him eating or not, I've been rambling on). If he stops eating for more than two days keep an eye on his weight. While he's on the meds he may not want to eat as much. Since he is so young/small he probably can't afford to lose much weight. If this happens you can mix some baby food (tukey, sweet potatoe.. you may want to buy a few, I found mine liked certain ones more than others), liquid calcium (you can get it at drug stores), and some pedialite (no flavour). Then drop in a few crix and smush them with a spoon (preferably plastic lol) until their guts are mixed in. Yes it's gross.. BUT it's better than throwing them in the blender!!! Mist your cham till he starts to drink, then use an eye dropper to drop the mix into his mouth. you may have to spray at the same time so he keeps his eyes closed, if the dropper scares him. If you can do it this way it's much easier than force feeding.
Finally, if you need anything else feel free to email me!!
chimakka@hotmail.com
~Lindsay
Ps, i know this was long, but more info is better than too little!! good luck!