well, what happened was she lost her hooks during her moult to subadult, i think she burnt her feet on the mesh which had a lamp above it (so afterwardsshe couldn't grip at all) but i managed to get her through to adult with alot of care (and sticky tape lol). most of her hooks came back but as she got older the back one dropped off and the others were a bit dodgy as well.
this cant be the complete explanation tho as i had similar thing happen to other ones, but not as bad. these were kept on twigs on the windowsill and not in a cage and misted frequently. one or more of their hooks became deformed when they moulted for no reason ie they were straight and not curved. hence they don't grip. inbreeding perhaps? the male i mated this female with was from another source and perfect so hopefully the nyphs should be ok.