I've done this before on a friend's AAX, but I finally attacked mine this weekend.
Someone has been in there before. Black Loctite used instead of the VW stuff. Oil pickup was clear apart from some orange dipstick crumbs and a small amount of other debris.
I would seriously recommend just replacing the pickup (and the green O ring) because bits of crap gets stuck behind the 'lip' which is hard to get out. But as I did it impulsively, I hadn't armed myself with any parts. So I did what I said I was too lazy to do and scrubbed it for 20 mins
Reused the O ring too as it was still pliable.
There was quite a lot of generic crumbs in the sump. No idea what it was, but thankfully not metal shavings. It's all nicely scrubbed out for peace of mind.
I thought I would throw in some Mobil 1 0W40 'New Life' as it was on offer over the weekend and the engine seem to like it. Very smooth.
Previously I was using Silkolene 5W40 which is a racing oil and clearly best saved for summer use because it was causing about 3-4 seconds of tappet noise on start up, which is an obvious sign of an oil being too thick to reach the head quickly. Even though it's a 5W, it doesn't necessarily pump like other 5Ws from cold.
And finally, never use windscreen glue to seal a sump to an engine block!!! Not my engine, but stumbled on it over the weekend and was in disbelief about the things some people do to their engines!