I had a cheap thermometer (this one) in my bedroom. Somehow it got hidden in the folds of a sheet that I’d left crumpled on the floor. I don’t think I normally stepped on it, since it was clean.
When I retrieved the thermometer a while ago, I found that the tube inside was missing! I shook the sheet, and it somehow went flying behind a futon, where it got stuck between the pad and the wall until I let it fall to the floor. I retrieved it, then put it back into the casing.
Now, the thing still seems to work, as far as I can tell (i.e. the general temperature it shows is reasonable), but given that the tube and the casing got separated (and I have no idea how), I have to consider the possibility that there was a break, and mercury leakage.
How do I tell, and what do I do? Shaking out the sheet got me nowhere, but how would I even see it if it did? Wikipedia says that cloth stuff that got exposed should be thrown away. Should I be tossing my futon and sheets?