Alriught I just joined this forum a few minutes ago so I'm sorry if this is in the wrong place or something

I bought myself a Pac man frog from not the most reputable of breeders I had read about these frogs and I have my frog (Salt) in a ten gallon filled with about 4 inches of eco earth it's at about 70% humidity the soil isn't soggy but it clumps if you squish it and I have a heat Matt on the side of the tank to keep the warm side at 80 and the cold side at about 70-75 I don't use a lamp because I'm afraid it will dry the soil out and since Salt is albino it will hurt his eyes but anyways that's the setup now onto the problem
Salt was eating very well as a baby to juvenile when I got him but after he hit what I would consider late juvenile he just...stopped I tried to wait it out but I'm genuinely worried he's losing weight now and it's been about 2 months I've been so worried and I considered force feeding but I'm deathly afraid of breaking his jaw I really live my little frog and the idea of making him suffer or starve makes me sick so if someone could please help me!