Make your fans bullet proof.

I replace the wire. The original wire is a single strand wire and breaks very, very easily. So, once I have the internal part of the fan out I replace it with a small gauge multi strand wire. I would recommend doing this one wire at a time otherwise it is easy to forget which color goes were. So just desolder the old wire and solder in the new wire. I have skipped this step only to have to go back and fix it later.