Found the same thing when my dryer kept stopping mid cycle. Watched three different videos that made the belt replacement look easy, but none mentioned the weird clip hiding under the motor mount. Ended up having to just feel around blind for an hour until my finger found it. What saved me was finding a written forum post from like 2012 where some guy described that exact clip in a rant. Now I always look for the old text posts or comments under the video where people ask questions. Those hidden details are usually buried there.

Thought oil was the whole fix too until mine did the same thing. Someone told me you have to wipe off the old gunk first or the new oil just pushes grit around. Tried cleaning it before re-oiling and the squeak actually went away for good.

Why'd you think putting electronics in a freezer was the move?

Tbh, I thought aging paper needed expensive stuff, but your coffee to stain paper idea changed that.

Read a similar story from a neighbor last week.