Neptr has thankfully begun to trust me enough to eat from my hand again. He's incredibly skittish, more skittish than what I thought a hamster from a breeder would be. I hope we can have a bond one day, and his rising curiosity in me has given me some hope.
I worry as his cage is really large. I had bought 140l of paper bedding, and it only had a dent in the shear quantity that I had initially put into it. He bit me as I did that change of 140ish litres of bedding, however I estimate I'd need another 200l to really have it "clean" but still keep his scent.
I've bought more bedding, but I don't want to stress him out anymore.