What is a product recommendation for fuel system cleaner?

I don't think I do have evidence that the fuel system is at fault but is it too early to replace spark plug and coil? My car is 46000 miles.

I have replaced spark plug and coil for cylinder 3. They recommended to add 44K by BG to clean fuel system.

IF # 3 cylinder has been confirmed as the culprit and # 3 is still misfiring - ignition spark is indeed sufficient - - testing compression and fuel injector operation is next step. As far as any fuel additive - it’s not going to hurt anything - however it’s not likely going to help anything either.. Good luck!