Despite the current fad, I'm no fan of Sea Foam. Injectors RARELY get clogged or dirty any more since U.S. gasoline manufacturers began including enough fuel injector cleaning additives in all grades of gasoline to keep them clean. That's been the case for at least 20 years. When fuel injection was still new, fuel injectors did get clogged and fuel injector cleaners were required... I'm old enough to remember those days... but no more. It's extremely rare for fuel injectors to have deposits form in them like used to be commonly seen.
So far as carbon deposits go, like those that get inside the throttle body and air intake manifold, use a good throttle body cleaner to clean that gunk out... for half the cost of Sea Foam.
And if there are carbon deposits in the combustion chambers which happens if a vehicle is driven too conservatively, plain water is highly effective at breaking up those deposits.
To me, Sea Foam is priced 2X as high as products specifically designed for cleaning the input area which is what normally gets dirty... throttle body cleaners. And a gazillion times higher than plain water that is commonly used to break up carbon deposits inside the combustion chambers.