As several people requested, a short tutorial on how to repair/clean/restore Alps switches, here demonstrated on a Chicony KB-5162 with Alps SKCM White switches. This tutorial does NOT cover desoldering and replacing completely dead switches, as this has been covered several times already on Youtube.
You will need:
-a toothpick
-two cocktail sticks
-a can of compressed air or similar dust-removal tool
-something to pull keycaps with
-optionally; lube to smoothen/quieten switches