My dwarf used to really like biting me, so i tamed him with a glove on both, then one hand. After a month and a half of this, he can be handled without the glove, but still likes to nibble a little bit from time to time. Offering him a finger in a cage means that he will for sure try to bite me, because he thinks that all that is droped in his cage has to be a treat or an intruder
... but out of the cage is really sweet except for pooping all around when he gets excited
. So it took a month and a half, but it was real fun