Best info I have found is here. http://www.owalreptiles.com/issues.php
No need to put the animal down. If he is comfortable in his surroundings eventually his symptoms will reduce. I was very bothered by them in the beginning when I acquired one by accident. He is a super mojave so the guy that i got him from did not realize he was spider. I now have another spider. Both had significant wobbles in the beginning. They are some of the best "pets" in my collection. I have been studying them pretty intently and gathering data. I have some suspicions about some things but I am going to wait until I have a larger group to make any conclusions.