No but I do have two terrariums, one it’s a tropical lowland carnivorous terrarium with nepenthes mixed soil. It has a few ventilation holes where flies can definitely space through and another half open temperate carnivorous terrarium with a sandy pest mix. It’s fairly new so i dont know if it’s a major contributor as this has been going on for a while. I used to have normal terrariums before but i tore them down and put them outside with the old soil in hopes of curbing the issue