Pull the squeegee down each pane in a single stroke from top to bottom. After each stroke, clean the blade with a rag so it doesn't leave streaks. (If the squeegee squeaks a lot, add a bit more soap to the water.) As above, remove any streaks on the glass with a chamois, and dry the muntins and sill with a rag.
More in Upkeep
Chamois, and a lint-free rag or two
like a cloth diaper or old linen napkin
to custom cut squeegee for multipane windows