I have had my tank for over a year and within the last 2 weeks my flipper cleaner has started cause hairline scratches wherever I move it on the tank. It’s a fairly new blade also and have never had a problem with it until recently I checked the magnet and there is no sand. It’s being caused by the blade. Has anyone had this happen to them? The scratches are hard to see in the pictures but very noticeable in person.