I have been using my i11s regularly in salt water since March but I never bend the steering tubes as I store it hanging under a carport (not fully inflated but enough to hold it's shape) and I transport it folded in half in a small SUV...I do have the sailing rudder on it.
Recently I noticed the steering was getting more difficult to operate. So before heading out to troll for chinook (basically 5 hours of dodging powerboats while dragging herring along the bottom..

) I lubricated the cables at the back (turn full left, spray cable with WD40, turn full right, spray that cable, repeat so it gets on the cables and into the end of the tube), then I loosened the steering handle and sprayed inside the unit. The steering is again working smooth and easy, just as it was when brand new. cheers, roger