12 ms·
The first thing I thought of when I read this was that it reminded me of the smell added to propane, to help people detect leaks. Perhaps the company simply de
by EdwardCoffin 10y ago
The first thing I thought of when I read this was that it reminded me of the smell added to propane, to help people detect leaks. Perhaps the company simply determined that their filters stopped working at that point, and give a perceptible indication of it.