Vent: My first attempt at hand-lubing switches went way too far

Honestly, wiping with a dry brush seems like a temporary fix at best. If the keys are already mushy and silent, that points to a deeper problem with the switches themselves. Gunk inside might be part of it, but brushing probably just moves the debris around. You might even push it further into the housing. A real fix needs taking the keycap off and maybe cleaning the switch with proper contact cleaner, or just accepting that the switch is worn out. A quick brush is just putting a band-aid on a broken leg.