Three season,
I just noticed there does not appear to be any crush seal/washers on any of the plugs in your picture at the beginning of this post.
If they came off as you removed the plugs I would be doubtful that they are genuine plugs in the first place, or did you take them off?
I only check my plugs at the beginning of each year, about 2,500 miles. they are usually slate grey in colour and dry, I wipe a little cooper slip on the threads when they go back in, and I only change the plugs every 4 years or 10,000 what ever comes first.