Picture windows call for large tools. The long cloth head of a strip applicator soaks up a lot of soapy water and knocks dirt loose without scratching the glass. For a cleaning solution, Weingard uses just a squirt of dishwashing liquid in a bucket of warm water—the less suds, the better.
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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