Hello,
I'm new here too!
My unit also uses Steris and does 20-30 procedures a day, and yes, our machines are always playing up!!
We use Olympus scopes too, and can confirm that Olympus believe Steris to be very aggressive on the scopes.
Olympus are / have designed a new cleaning machine apparently, that still uses parecetic acid (I think), but doesn't heat to such a high temp as the Steris Machines. However, the equipment comes out as "High Level Disinfection"not "Sterile". You would need to check with Olympus to get more accurate info (I'm on Maternity Leave at the moment, so feel a bit out of touch!!).