Okay, I consider myself moderately intelligent. But I can't figure out the trick to removing the oem floor mats from their anchors. The Owners manual is no help, as it just says to make sure to use the anchors. My old Prius had anchors and they were easy enough for even me to figure out. Turn the anchor to line up with the slot in the mat and remove. Voila! But I can't figure these things out. Can someone dumb it down for my feeble brain, please?