First off, I think congratulations are in order to Vixen, approaching her/his/Xer 1,000th post!
Second, does the selective cleaning include Amanda and Raf's DNA? Or just their fingerprints?
If its just fingerprints, how did they know which ones were theirs, and which one's were Rudy's? With the lamp perhaps? That's more plausible somehow?
And how would they selectively clean only their own foot prints made in Meredith's wet blood?
And, I'm afraid to ask, by what manner of diabolical "deceit", did they manage to sucker Rudy into neglecting to flush?
Who knows? The Shadow Knows! Don't feel obligated to respond, I'm not really expecting any kind of rational answers - because there aren't any.
Don't you know? They did it with the magic soap! The kind only Amanda and Raffaele know about!! Clever little minx that Amanda is!