This may sound like a silly question, but I was wondering if anyone running the ECHO has noticed black and whitish-yellow build-up in the lines (sometimes it is bad enough to clog the line)? We decontaminate frequently with the Rely On, as directed and we follow all the recommended procedures and we have noticed this build-up and foul smell in two of our three ECHOs. (And when I say 'foul' smell I mean it. It is really putrid sometimes. :disbelief) The waste containers are emptied and rinsed frequently, often more than once per shift. Also, the build-up is in the external and internal waste lines. It has gotten so bad that we just change whatever tubing we can, when we clean the instrument. It started not long after we started running patient samples on them and it hsan't gotten any better. We don't seem to be getting anywhere with anyone to resolve it. I was wondering if anyone else has run into the same problem and what you did to resolve it, if anything. Thanks