He looks very dehydrated
His casque look sunken and so do his eyes. His casque looks a bit thin in the other pic (yelling), too. He looks stressed and pissed in each photo. How old is he now? Your photo says 4 months.
I am also trying to figure out what everything is in his cage? I see the dripper on the closet shelf - do you use it? How else does he get moisture? I agree w/MWheelock that showers will help, but you might want to concentrate on getting his overall cage humidity up a few times a day. You can do it by using a mister or humidifier on a timer as well as several hand mistings. His cage looks a bit sparse, too. You mentioned you got him a schefflera which are usually nice and full, just make sure it has good drainage and does not get soaked regularly or you will lose it.
Do you live in an area where you can set him up outside on warm days? The more humid the better. I live in New England and struggle with humidity issues every year so if you can take him out, do. Be SURE he can get to some shade if he wants and you can hose him down in his cage. Use a nice fine mist setting on a sprayer, then let him soak up some sun. If you can't take him out you can wrap 3/4 of his cage in plastic shower curtains (or other) and cover his cage at night.
What are his temps? What are the lights you are using - both basking? If one is a Mercury Vapor light it is way too close. They should be at least 18" from his basking spot.
I know in a previous thread you mentioned a few things about your setup. but you might want to be more specific on gutload, supplement frequency and brand, BRAND of UVB lights you are using and address some of the things I brought up above.
Well, hope this helps and keep us posted!