Once in a blue moon patent medicines will clear a dissolvable bit of foreign material that is partially blocking a jet and starving the engine for fuel...
We clean up malfunctioning gasohol carbs by disassembling the carb, lightly blasting the metal parts with baking soda then boiling in hot water to clean up the soda residue. They look like new.
If you are doing a camp spot overhaul where air compressors and soda blasting guns are frowned on, sometimes a good boiling will remove the gasohol induced crud.
Avoid the urge to poke sharp metal objects through the jets and passages and get rough with stuff... fine copper wire...
High possibility this will not work on rv.net carburetors of course.