Starting at the top left, pull the squeegee over the soapy pane in a reverse-S pattern (left-handers would start at the top right). At the end of each stroke, wipe the squeegee's blade clean with a lint-free rag. Cloth diapers or old linen napkins are perfect for this task.
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Chamois, and a lint-free rag or two
like a cloth diaper or old linen napkin
to custom cut squeegee for multipane windows