The bra clasp info is correct. Italian dish washing detergents often contain bleach.
No, Bruce, it's inaccurate, as you should well know.
There were 5 people's DNA on the clasp - Meredith's, Raffaele's, and 3 unidentified females. That is hardly "many other people that visited the apartment".
As for bleach and cleaning dishes, it's actually not unusual. Boy Scout manuals actually instruct that a proper wash/rinse cycle includes a low concentration bleach rinse for sanitary reasons. That, of course, doesn't mean we ever did. I just know that it's not unusual for bleach to be used to sanitize dishes.
However, Kermit (et al) has conclusively shown that the detergent under Raffaele's sink is not dishwashing detergent, but laundry detergent.
Bruce, here's where we have a bit of a problem. You claim you're positive of Raffaele's innocence - even offering the solution that Raffaele used a dishwasher and a detergent with bleach to clean the knife. However, you, at no time, did the real research to find out just what Dixan detergent is used to clean. Nor did you, in your multiple watchings of the video, care to take note of whether Raffaele even had a dishwasher.
To the rest of us, it's readily apparent that you're falling into the classic woo of paying attention only to what supports your particular theory/belief and ignoring that which could counter it. This is no different from Dan O's thread asking for everyone to ignore any bit of evidence that could point toward multiple attackers/Raffaele/Amanda.
If you feel this is a personal attack, then you have a lot to learn about critical thinking and how to form a proper argument.