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Someone just ask me about the easiest way to preserve selflife of fresh truffles.
I just made a post about this two months ago, but from the same work, the easiest and best way is an ultrasonic bath (at 35 Hz) with 70% ethanol for 10 minutes.
Probably what they do in the minute 1:20 of this video of a Chilean company. I put the link just because I enjoyed this video to promote truffles in Chile. Well done!
http://orangutan.cl/project/trufas/
This type of ultrasound devices are relatively inexpensive, but keep in mind that when you work for a certain period of time, they generate heat … this ultrasound is worth only $ 30:
Marcos S. Morcillo
trufflefarming 
Thank you for this very interesting information. I was looking around here in Europe and the Chicago Electric cleaner does not seem to be available. I did find similar machines that work at 42Hz. In your opinion, would this make a difference?
Kind regards
Thanks Alex for your comment.
I just used the image of this ultrasound device, ’cause it was the one used in the chilean video, but of course, there are lots of better and more expensive ultrasound deviced that can be used. The idea is to help to clean the truffles, so the dirt and clay sometimes attached to the truffle surface easily follows with the ultrasound.
All the best,
Marcos