Help on Hermit Crab Mites!!!!!!!!!?

Please! I need someone to help me. So something bad is always happening to my one hermit crab who is isolated from the other crabs. It all started on his first molt. Long story short, his second molt has passed, now he has mites in his tank! I went into my room to check on him, when I found him naked in his water dish. He was acting slugging and looked sick for the past few days or so. But I freaked out when I saw him like that. So I rinsed out his shell and had my dad stick the crab back in the shell. Since his cage was in need of a deep cleaning I put him in a small tubberware bin with damp sand and a towel over him while I worked on cleaning the cage. Then my little cousin noticed tiny little bugs on his toys. Great, now I freaking have mites. So I threw away the cheap tank he was living in with the sand and some of the toys, and boiled the rest of the shells and toys. I also soaked my crab in some salt water for a minute making sure to try and drown any mites. my crab is now in a new tubberware bin with a towel over it. I have no idea what the hell to do, i am freaking out. The hermit crab cage was also on my headboard in my window. I am so scared to sleep in my bed too cuz i think they might have crawled out onto my bed!!!!!! PLEASE! !!!!! If you have ANY information that would help, PLEASE let me know! I really need some help!