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The move seems to be toward using microfiber flat mops, although good quality string mops work well when properly used.
Neither will clean when soiled, so both need frequent laundering in a mop bucket of some sort while on the job.
Microfiber pads load up quickly due to their small surface and effective action, so some folks have taken to using an abundance of pads, changing to a fresh one when soiling is apparent, and laundering them off-site later.
This can be cumbersome.
I don't see cross-contamination of floors as a major health threat for two reasons … Lynn E. Krafft, ICAN/ATEX editor
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