Anyone not willingly plugging their ears knows this.

For me, Sword Art Online Abridged is cannon.

I use a Bluetooth to aux for my phone, which is only slightly annoying at times, but I blame the apps. I can play, play, pause, skip forward with my Bluetooth receiver, and OP will miss out on that, except they can PROBABLY use the dial blindly for just that.

I used it for cleaning flux after soldering and it would sometimes leave a chalky white residue. It could have been the PCB reacting or other impurities. Anyway, the boss would sometimes complain about it, but they was what we had.

Ipa can leave a white reside. It doesn’t hurt anything, but it might not fully disappear.