We have used the ECHO for almost 3 years and have not had all the problems you describe. The most we have ever done is changed a bent probe (someone left a cap on) and a minor leak that required a tube exchange. It does sound like a lemon or even bleach cleanser-we use the alcohol based wipes from Immucor to wipe probe, clean inside etc. One of my techs thought they could use the standard counter wipes (contains bleach). What does your rep and the BLUD line suggest?