plug wire ruined?
 

I pulled one of the MSD 8mm plug wire off a plug today to see how much clearance there was with the EMI exhaust. I noticed that a small metal piece stayed stuck on the end of the spark plug. Is this normal or is the plug wire broken? I didn't want to remove another wire to see if it did the same thing cuz I figured I would be better off having one cylynder missing rather than two when I go to put the boat back on the trailer next weekend.
The cap, rotor, plugs & wires have two full seasons, around 150 hours, on them. I know I'm overdue for new sparkplugs & cap/rotor , but should the wires need to be replaced also??
Thanks for any input

get new end and redue plug wire simple and if its a complete msd system i highly recomend cap and rotor i carry spare cap onboard atall times these caps crossfire all the time , moisture issues also