Rislone Fuel Injector Cleaner is well regarded, has been cheaper years ago but price is reasonable given the current inflationary pressures.
Currently in special for $13.99 at Supercheap.
I put some fuel injector cleaner in my car once a year (whether it needs it or not) as a preventative measure. It is one of the few car snake oil products that seems to work.
uwotm8