I will tell you what I use now. I bought an ultrasonic cleaner from ebay, and I use a solution of water, aluminum wheel cleaner and purple power cleaner. 15 minutes and the carb is as clean as it is going to get. Rinse it in water, and blow dry. No stink, and it seems to clean very well. The ultrasoni cleaner is also great for small parts like bolts, rocker arms, rods, etc. The only issue with carbs is, that if you leave a carb in too long, it can lossen the lead plugs in a carb, so don't over do it.



https://www.ebay.com/itm/ALLSTAR-PERFORMANCE-Ultrasonic-Cleaner-Small-1-Gallon-Capacity-ALL10640/233489618516?hash=item365d10d654:g:aMkAAOSwdnNePwqt