1) Instead of Giselle, he should have asked Nora to kiss him. No one would have thought twice or even considered that questionable or anything. He came to Giselle in the middle of an argument and randomly kissed her. And asked her to kiss him back. That became suspicious. If he would've gone to Nora randomly and would have talked to her randomly, he could've gotten her to kiss him and done. She or anyone else wouldn't even doubt him. Also, I think the reason he made the move on Giselle was because he was frustrated that he hasn't been able to kill yet. So he did it very hastily. That too became obvious. Even on the precap the way he randomly went to the kitchen and started behaving psycho was too abrupt. He should have started a fight sometime back and done it in that process. This is making it too obvious.
2) He should have taken Suyyash or Kish or Keith's clothes to put in the box. He took Mandanas because he wanted to let his friends be in the game for longer, which I get. But everyone knows that Mandana is very particular about her stuff and she would immediately realise if something is missing or not correct.
3) Like Suyyash said, his step back from the game is supremely evident. Yes he tried to be part of conversations and all, but not with as much shiddat as before. He's making this too easy for them.
So yes, he HAD the task given to him. Had he played a little smarter, he would've had it this time!
Also, superb task after a long time! Could see how pumped and interested even the contestants were and as viewers it's something intellectual for us also to see finally. I love playing the game Mafia, which this is a real life version of, and watching this has been really good. Guessing the killer makes you think and works on your brain muscles and I'm glad BB got a mental game rather than a physical one this time.
-Rhea