I went to change plugs the other day and I ran across something I never seen before,When I put these plugs in I gapped them to .035 and when I went to change them the other day all looked normal.With the exception of the plug nearest to the fire wall on the driverside when I pulled it the gap was almost completely closed,I couldnt even get a guage in there to measure it,I have never seen this before?? how does a spark plug loose its gap? any thoughts would be appreciated.Thanks in advance...