I have a 2004 Sundance Altimar that came up with the FLO error. We have only had the tub a few months so I have no idea the last time the footwell intake filters were changed or cleaned. I want to take the covers off to clean them but I have no clue how to take them off. Twist, pull, no matter what I do no luck. I dont want to break anything & I feel this is what is causing the FLO error. How do I get the covers off???? Please help!!!