I use non-ethanol fuel, plus this:

https://gumout.com/mstu/multi-system-tune-ups/

It’s basically like SeaFoam, but also has PEA (Techron) in it, so helps clean up anything I may put it in that is furl injected (high pressure deposits).

Usually costs the same or less than SeaFoam, so it’s like getting the PEA (Techron) benefits for free...