the only real way to remove it all is good ol fashion carb cleaner and elbo grease. simply spraying something in ur intake wont do much, even if it did all that carbon would go into the combustion chamber and either end back where it came from or get stuck down the exaust pipe, so it causes build up in one area or another, unless u take it all apart and clean it!
thanks volk for fixin the pics. all that weird white stuff is soap bubbles from dawn. thats also wuts all over my drive way