Ugh...ever since moving my snakes to their rack system and removing the lids off of the tubs I have been having a huge issue with fruit flies\gnats . Every time I open one of my upper level tubs I get a few that fly out. I am finding these things all over the house now. There is no feces or urates in the tubs 90% of the time but I am still finding them there. Killing these things makes me feel like Hercules vs the Hydra. Every time i kill one another two pop up! They also seem to like getting in your face for no reason! Anyone else dealing with or dealt with this issue? BTW I am using Kraft Paper for substrate.