I noticed today that in two of my tarantula tanks that there a little bugs everywhere. They are really small and hard to see, so I cant get a good picture of them. Anyone have any ideas what they are, or how they infested the tanks? I cleaned them out dumping all the substrate, rubbed it down with alcohol, and then washed with soap and water hoping I killed all of them. I don't know if they will hurt my T's, but I'm not taking a chance. What am i doing wrong, and how do I stop this from happening again? Any help will be greatly appreciated.