anyone know much about these....I have a bunch of junk that needs cleaned. dirtbike carbs, spray guns etc. My neighbor had his lawnmower carb done and it looked like brand new. Some are cheap (harbor freight) under $100 bucks then some are $150 to $250 and then some are thousands.....seems like the cheaper ones are called jewelry cleaners where the more expensive are carb cleaners. Do they use different chemicals or whats the difference? Most of my parts are pretty small.