Advertisement I think if 5 slings die nearly immediately after arrival some kind of toxins seem a distinct possibility - and I think the setup is probably not to blame because a bad setup usually takes longer to kill even a sling - unless you put them all on a heating pad that got too hot or do something stupid like that. Was it a wood cabinet? Wood may be treated against termites for example and that wouldn't be good for any tarantulas either. But there are other possibilities: the slings may have been sick to begin with, they may have been exposed to too much heat during transport, etc., etc. Don't! Sterilizing things is practically always a bad idea, except in an operating room. Sterilizing means you kill everything, but bad, pathogenic bacteria are usually kept in check by the usual bacterial flora you find all around you. Sterilizing provides a clean slate - and the first bacterium to arrive will take over. If that's a pathogen you will be in trouble. Microbiologists have been fighting a losing battle against the sterilization mania for decades - it creates a lot more problems than it solves.