Couple of points.
The point raised which relates to anaesthetic gas was raised quite extensively on another forum a while back. No body seems to have suffered an attack themselves or know of anyone personally who have been attacked. Doesn’t that tell you something? However, the above comment and missing shorts is the first I have heard where someone has actually spoken directly to a victim, though nothing was mentioned above about feeling ill etc. This type of burglary happens in houses as well, does that mean houses are also filled with anaesthetic gas?
In the other forum it was also agreed if anaesthetic gas was sprayed into a camper, it would probably have catastrophic effects as anaesthetic gas is explosive. And …..what is running in most campers ….three way fridges with gas flames, plus boilers. Since no one had heard of any vans being blown up, perhaps its all been blown (excuse the pun) out of proportion.
I like others await hard evidence.
CO detectors and their detection abilities.
With my CO detector (battery operated, cost about £35) I have noticed if the sun is on the varnished walls it goes off????. It has also alarmed at about 4 in the morning whilst away. We had finished cooking etc about 8, so not sure why it went off (no heating running or other external sources that could have contributed), however as a precaution we vented the van.
Not sure if its effected by dust as we have to drive down too many dirt tracks to get to our home, which could be another consideration, making it overly sensitive.
Put it this way. At the end of the day they along with fire extinguishers are very cheap insurance.