i cant really see what u are talking about from the pic, but i am guessing that you cant reach it with some sort of q tip or pipe cleaner? what alwaswy works for me is pouring a good amount of salt in the bowl, mouth piece and carb. then filling it up with 90% alcohol and shake the hell out of it for like 2 mins straight. wait a min and do the exact same thing again and it should be good as new. The salt is an abrasive that will get rid of the resin that is stuck. make sure to rinse it good with water afterwards and you wont be able to taste the alcohol like alot of people claim