Cover stitch...

Once again we are starting to teach new students to use the cover stitch machines and once again one particular person keeps breaking them. I came in one morning and saw 3 of these signs under the presser feet of 3 cover stitch machines:

Well just so you know a cover stitch does not have a bobbin it in fact has a looper. And once I slid back the cover of the machines I found thread wadded up and wrapped around the inner workings like so:

A good 2 hours spent taking a razor to all that thread. After all the machines were rethreaded and sewing properly, I went to class and came back to see the graduate student on the machine with a tool box next to her. She managed to put it out of working order within 55 minutes. After explaining to her what exactly she needs to do when sewing with it she once again put a different machine out of working order. I have hit the tipping point, I have been tried my hardest to tolerate her and teach her but if she doesn't wish to learn I wont waste my time. There may be a few pictures of her crying in the near future.