Switch stickers - do you use them? Have you ever used them? Do they actually work?
Never used them, so I can't really say something about it.
Krytox - why are they so expensive? Is there any sensible replacement?
It's industrial lube containing PTFE (Teflon), in bulk it isn't even THAT expensive, but the MOQ is insanely high for people that want to use it for keyboards, also you usually use a mix of their oils and greases, so the people who buy it in bulk have to put a lot of work in. You can actually buy it for a reasonable price at VW dealerships/authorized repair shops, Krytox 105 is part number "G 052 172 A1" (around 30-40 Euros for 30ml) and Kryrox 205 is "G 052 172 A3" (around 35-50 Euros for ~55g)