Petco Ball Python

[noodle]

I purchased my first baby ball python from petco and shortly realized it was most likely a mistake. I wasn’t too knowledgeable on ball pythons but I was so eager to finally get my first snake. I purchased him underweight. Which at the time I didn’t know. He stays in a 10 gal tank, with a nightlight reptile bulb, and a heating pad. He has a water dish, aspen bedding, a rock to hid in, and a small decoration. I spray his cage a few times a day to keep it humid. He’s fed twice a week on fuzzies because I got him so small. It seems like he’s only losing weight and i’m worried. I’m not sure why he won’t gain weight. His shed is stuck and his skin is therefore wrinkled. I’m super worried about what’s wrong.