Spark plug change

[Goran]

I plucked up the courage and changed the spark plugs on my 8 all by myself. This was my first diy spark plug change in any car.
It wasn't that scary at all, none of them were seized, and to my untrained eye they all look fairly ok, number 3 looks like it had a bit of blow-by past the ceramic insulation.
I didn't clean the threads using those thread cleaning tools, does anyone use those?

This was 4.5 years since last change. Seems to start up quicker now.