2008 s80 4.4l ignition coils
 

Hi..
Newbie that hopes I'm not the only one to ever have this problem.
Every month and a half maybe two moths I have an ignition coil or two go bad and have to be replaced. It's not always the same coils so anyone around is stumped as to what could be causing the problem.
New plugs, ran seafoam mist through engine to clean upper cylinders, all eight coils have been replaced with several of them more than once.
Love my Volvo but at my wits end and my wife is tooòoo.
Please help if you can if you have had this problem or know the solution.
Thanks.