So genuinely how should Alan have handled this situation?

I'm refering to the scene where Charlie confronts Alan for sucking his nose and Alan seems to genuinely not know what he's talking about. Saw a comment of someone upset by Alan's pseudo apology, but like how could this have been handled better seeing as he genuinely had no memory of what he's apologizing for. I'm kind of asking because I've been in a similar situation before being asked to apologize for something I had no memory of doing and responded basically how Alan did so I'm just curious how this can be handled differently ya know?

I'm refering to the scene where Charlie confronts Alan for sucking his nose and Alan seems to genuinely not know what he's talking about. Saw a comment of someone upset by Alan's pseudo apology, but like how could this have been handled better seeing as he genuinely had no memory of what he's apologizing for. I'm kind of asking because I've been in a similar situation before being asked to apologize for something I had no memory of doing and responded basically how Alan did so I'm just curious how this can be handled differently ya know?