If you have E85 gas available, look for it, run that for a little while to clean carbs also. Or get the carbs full of it and let soak a bit then run.
E85 was cheaper than Unleaded when I was getting it. 85% Ethanol alcohol 15% gasoline and works as well as most store bought additives but costs far less! E85 should be Ethanol which is not as bad on parts as Methanol. I avoid buying 10% or more methanol gas, That stuff is nasty!
Not everything runs great on E85 but that is not a problem, just mix with real gas for your own blend!
50% unleaded 50% E85 makes about an E45 or so.
My old Ford truck did not like straight E85 so well but ran fine on 50/50 mix. The Ethanol cleaned up the whole fuel system so after awhile my old truck actually ran better than it did before I used the E85 mix.
My problem is no one sells E85 around here that I know of. I was getting E85 about 150 miles away when I would be passing through there on trips.
Rubbing alcohol has too much water in it for me. I don't like it for much of anything. It is cheap though.
Methanol is nasty stuff, toxic absorbed through skin, eats parts worse and such.
Ethanol is just Moonshine. Moonshine is Illegal since no taxes were paid! Pay fuel taxes and poison it and it's motor fuel. Pay liquor taxes and it is EverClear 190 proof at the local liquor store.
About 150-200 proof Ethanol will absorb water from fuel also like drygas etc.. does.
If looking for cheap fuel cleaners to run, compare E85 to store bought additives, if E85 can't be had then compare size and cost for additives at store and cost of Everclear from liquor store.