Hi everyone - I'm new to the site but am in desperate need of some help with the new baby BP I've recently acquired from a friend. It is seemingly turning into a rescue & I am beyond worried. Here's what's going on;

I got the little guy while he was in shed, milky eyes and all. I immediately noted him being underweight, in an insufficient enclosure considering the low temps, that yellow, woodshed bedding you usually see rodents in in pet stores, and zero moisture.
I immediately switched him to 100% cypress mulch bedding, have kept his humidity levels above 50%, temps above 80 degrees, been in contact with a breeder due to his inability to shed, and have successfully force fed him this previous Thursday on account of him not eating in 3 weeks (his previous owners fed him 1 week prior to giving him up). I've also been doing soaks, which have previously helped, but now only seem to stress him out.. He is in a 20 gallon tank, I have a 75 watt heating bulb in, and I have the mesh lid covered to retain moisture.
His eyes have been clear for over 1 week, though he is dull and still looks as if in shed. After the force feed of only a pinky the little guy has been tilting his head back either staring or rolling back, he has been increasingly lethargic, and has been failing to even attempt to get the shed off. I also don't think the pet store owner who force fed him for me harmed him, as they are more experienced than me with problematic BPs.

I am so worried about this little guy and hopefully I've provided enough information about what's going on. I'll try to post pictures asap. Any advice would help me greatly, because this new BP mommy is beyond discouraged and upset..
Thanks you guys!