I recently purchased a new Monster and am having trouble with the tank. When I attempted to lift it, the tank was rubbing against the metal "hook" that the tank latch mechanism secures to when locking it down. I ended up scraping paint off the tank just to lift it. I'm now trying to lower it back down and it's hitting the same metal hook. What step am I missing here? I've never experienced rubbing with my previous Monsters. Thanks in advance for your help!