A clean window tracks makes a bigger difference than you'd think. Here's the most effective method, plus the mistakes most people make.
Use the crevice tool to vacuum out dirt, dust, and dead bugs from the window tracks.
Sprinkle baking soda along the entire window track.
Spray white vinegar over the baking soda. The fizzing reaction lifts dirt from the tracks.
Scrub the tracks with an old toothbrush. Use cotton swabs for tight corners.
Wipe with a damp cloth to remove all residue. Repeat if needed.