We have a Diedrich IR-7 with an afterburner. It is a really beautiful machine, but I think that we haven't been cleaning it as well as we should be. We've stayed of maintenance as far as checking that all the components are working and do some vacuuming after every roasting session, but there is a good amount of black grime that has built up on the doors and walls where the chaff is collected and where the impeller is housed. I read in roast magazine that the grime that builds up, like chaff, can cause a roaster fire and even before reading this it didn't make sense to me to let it get so dirty in the first place. So my question is am I right to be concerned with this build up and if so what are some tips for cleaning it up. I spent two hours scrubbing one of the doors with a sponge and simple green and I was only able to clean 1/3 of the door. Your help would be greatly appreciated.
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