I have heard it, I think its true. But they won't always. I have left my B. albopilosums molt in ther (until I rehouse) and its been there for a few weeks and it hasn't eaten it. But I just don't understand, how would they eat it if their fangs are so soft and delicate?
well, they can't really eat the molt. it is mostly made out of chitin and other stuff which they can't digest. that is why you get a bolus when a spider eats another bug
but they do occasionally pick up their molt and mouth it. the best hobby theory i have seen for that is they are drinking the little bits of moisture left in the skin.
i recently had a local ~3"DLS t molt and saw it with the skin in its mouth roughly 24 after it finished molting. it was fairly amusing cuz i had always looked askance upon the ppl who said their t was eating the molt. i recovered the molt roughly 60 hours or so after the t finshed shedding and had the molt in it's mouth for hours that i saw... and when i spread the skin i could notice little to no missing material.
From what iv'e heard , they dont eat it . Ive heard they do it for some purposes like moisture or some time of minerals ? I dont know . But I do know that they arent eating it because theres no meat in there .,