I just had my first SSSS experience. I had a bit more inpection than the OP...my bag is swiped with a cloth and, of course, after many, many, flights, I am told my swatch is a "hit"....but this could be a reaction to talcum powder or skin cream product...I am told after a few questions....I let then do their thing and was on my way in about 8 minutes...the head guy was totally un-polite..the other was quite friendly..it was almost like the good cop--bad cop routine in movies.