top down the cleaning agents cut through the grime below unevenly and you end up with a streaky job because you couldn't control the dwell time equally on all surfaces. Bottom up, you've already cleaned it so it doesn't go streaking on you.

dan shall we circle the quad again becker


-----Original Message-----
From:   Met History [mailto:[log in to unmask]]


Why, specifically, is it necessary to clean from the bottom up?   c

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