I have Hoshizaki KM-500MAH air cooled unit and it is producing ice but at a slow pace. I emptied the machine 2 days ago to clean it and it only has the bin half full. The machine was cleaned recently with lime away and is very clean. The ice that is made comes out perfect. The air filter on the unit was missing when I inspected it and tons of dust and such were built up all over inside the unit and on the condenser coils/aluminum "fins". I tried to blow out the dust, vacuum it out and use a small, fine brush (that did no damage the aluminum "fins") and was able to get out a lot of the build up but most of it is seriously stuck in there. I am going to assume the bad air flow is to blame for the slow ice making. Either way, I know this is an issue because not a lot of air is flowing through the coils. A minimal amount of air seems to be actually passing through. My question is, what can I use to clean the aluminum "fins" and condenser coils? The build up appears to be dust, dirt and grease from a restaurant. I was told car brake cleaner is a non-rinse cleaner that would work but am skeptical. Thanks in advance!