I have a situation where lizards are getting into Pelco SD435 spectradome cameras. They come up between the 2 shrouds to a gap at the inside top of the housing by the heat sync. This gap is open to allow air to circulate but Pelco put no screen on the gap to prevent critters from coming in. We have placed a screen between the 2 shrouds for now but Pelco warns of overheating and voiding warranty although they have no solution. Has anyone else encounted this and have any other ideas?