The longest non-medical word (because c’mon, that’s Latin) is antidisestablishmentarianism. I think it is basically being pro-establishment (government) because of the double negative in the word.

I love btop!

vacuum

For slippery shoelaces that seem to come undone all the time, I’m so happy I learned Ian’s Secure Knot. It’s very strong, but still comes undone easily only if you pull on both of the lace endings at the same time. Pulling on one end won’t cause the knot to come undone. Once you’re practiced, it only takes a bit longer to tie than a regular shoelace knot.