What's even better is when you live in rented student accommodation. The beds have likely had many people in them doing many things other than sleeping. At least I have a mattress topper. Although I didn't find anything suspicious under UV light thankfully. --- Post updated --- On a slightly unpleasant note, thank Christ for the internet. I use Yamaha EPH100 IEM's, however this particular headphone features a fun little design flaw, condensation can form inside the headphones. The first time I learned of this was on the first day of using them (it was cold outside) and one headphone cut out entirely, I took it out and a drop of water fell out of it. However recently one of the headphones has been quieter than the other and not as well defined. Turns out that is part of the same problem however it can be fixed by taking the headphones apart and cleaning them out, which thankfully someone documented the process of, lets just say the insides were not pretty. On the other hand they sound great again. They truly are fantastic sounding headphones, however someone at Yamaha is a moron for not noticing this design flaw. It doesn't seem to effect people with desert like ear canals though which would explain a lot. I however have to wear something on my head while using them in the cold in order to keep the metal warm to prevent condensation swamping them.