and the bloody stick was impossible to snap!
You have to break the stick in half to fit it in the tube. Apparently they have a weak spot to enable this, so I did the test, snapped my stick, not easy, went to put it in the tube and it was still too long to fit the lid. I then spent 5 minutes trying to snap another 5mm off, it's not allowed to be too short either so really tricky, so no doubt I've now contaminated the sample.
Either I'm really weak, I got a dud, or a design flaw? Anyone else had the same problem?