Gasoline additive for carb messed up from sitting?

Keep in mind that he is looking for a FIX, not hints on how to prevent it. I am not professing to be a small engine carb expert, but I wonder if you drained the fuel tank and put in a heavy mixture of Sea Foam (1/2 gas 1/2 Sea Foam) and then got it running with starting fluid (and kept it running with intermittent squirts) if that would pull the cleaner through and clean the carb. I'm just thinking out loud. Might that work?