Lubing switches is the single most transformative mod for mechanical keyboards, but it requires patience and precision. Essential tools: a switch opener, fine paintbrush (size 2-4), tweezers, switch holder, and lubricants (Krytox 205g0 for stems, Krytox 105 oil for springs, dielectric grease for stabilizers). Process: open the switch, remove the spring and stem, apply a thin film of 205g0 on the stem rails and leaf, oil the spring with 105, reassemble. Common mistakes include over-lubing (causes sluggish, mushy feel), getting lube on the leaf contacts (causes registration issues), and mixing incompatible lubes. Tactile switches need less lube on the bump legs to preserve tactility.