From the May 3 Boise article.
"Clogging has also been a problem with farm-sized digesters in the eastern U.S., where it can take weeks to cultivate a new colony of bacteria after shutting down a system for cleaning. Blowing sand and dirt are the usual culprits, eventually choking the systems and causing shut-downs. KEISER maintains that HIS TECHNOLOGY, developed and licensed by Utah State University professors under the auspices of Logan, Utah-based Andigen Corporation, has solved this problem."
If you find yourself in a fair fight, your tactics suck.