Yep, any flammable aerosol will work. I personally like to use either propane or mapp gas, like plumbers use. It doesn't make any mess to clean up. If didn't have the torches, I wouldn't be opposed to whatever I had on hand.

 

I know it's probably not what you want to hear, but I agree with Hamlin, in as much as you need to go back to square one.

When I cleaned my carbs I didn't split them, I just did them one at a time, so as not to get the parts interchanged between different carbs. I soaked all the metal parts in carb cleaner and was scrupulously clean.

The first time I took the carbs off, it took me forever. But eventually I could whip them off, including tank and plastics in about ten minutes

Be meticulous, be thorough, do it once. Leave no stone un-turned, because that will be the stone that's hiding the problem.