Until this, I have never had mites, either. But, now i'm feeling a little paranoid. I usually go to reptile expos once a month and sometimes 2 - 3 times a month. Not to vend (yet), but I have been concerned about the possibility of picking up hitchhiker mites just from walking around there and bringing them home. You don't think it would be wise to at least wipe all of my tubs and racks down inside and out with diluted Nix once a month or so?