I have had Opti Coat 2.0 on my two SUV's and the don't seem to shine and repel dirt/water/bugs like they used to. Applied it one year ago. Live in the brutal sun in AZ. Time to recoat?
^^^ Agreed. When it seems OC is no longer there , it is usually due to the car needing a deep cleaning to remove what has bonded to the coating. Remember the only way OC is removed from the surface is to be abraded off.
If I were you I would try a citrus or dawn wash first, then clay. See if beading improves. If the OC is truly "not there" either it was installed improperly or something has been done to abrade it off the surface.