Looking for a good way to clean dirt from radiator. Ever since I have had this combine it runs to the upper side on heat and occasionally gets hot! I got to looking and there is dirt and bean dust between the fins that have been there for most likely 20 years! It is set up like concrete! Any Ideas on how to soften it up so it will come out! I hate removing it, I have heard that is quite a job! If I do I may just put in a new one, but hate to go to that expense since this one doesnt have any leaks just very dirty! I have blowed it out every year since Ive had it and assumed it was comming clean, It wasnt.