For all Netherland Guys who have to answer that question for a quiz (I know everything
Here ist the answer:
Al never repaired his socks himself!
In Episode "111 - where's the boss" - we see Peggy repairing his socks with a "Bostich". (I'm sorry, but I don't know the english word for it). That's a tool for binding books for exapmle. I found a picture on the Internet: http://www.geocities.com/chrisliechti/d ... ostich.jpg
It's some kind of a "tacker" - so it's called in the german-slang. If anybody knows the correct english word for that please post it here!
In no other episode we saw someone repairing Al's socks.
Hope that helps.