Get some trufuel. I would tell you to get motomix but it has oil in it. Moto is the most pure fuel trufuel is next best plus you can buy without oil. In my past gas Generator I would run it dry and then drain the bowl. If you run your generator long enough for trufuel to flush out your lines and carb and then have trouble with the carb later I might consider it's a carb problem. I went diesel. The gas is crappy out of a pump unless you buy no [emoji535].
Seafoam my clean it all well but it can not change pump gas into acceptable fuel for long term storage, imho