I've used food-grade orange oil imported in bulk from Florida for a number of years. The peers are soaked in a plastic pail and scrubbed with a cheap toothbrush, with heavy grease lumps removed with a bamboo chopstick whittled to suit the purpose. Parts are rinsed in warm soapy water, then clean water, then dried with an old tee-shirt an lubricated. The orange oil is filtered through a cloth to remove solids & a magnet below the plastic pail captures ferrous metallic particles, now ready to be used again. I have an ultrasonic cleaner but the firs aluminum piece that I put in there, with nothin but a mild soap solution, began to disintegrate before my eyes.
Carlos Ovalle Long Beach, California, USA
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