Watched a guy in Tucson run his clippers dry for 3 minutes and the blade got hot enough to burn
Everyone sprays that cheap coolant on the blade every few passes, but nobody empties the little tray at the bottom of the jar and once it fills up with hair the spray just floats on top doing nothing, which I know because I had to redo 20 fades in one Saturday before I figured out why my blades kept dragging.