'Seems like a great idea in theory, but not in practice.
Not to mention, a bagged cleaner lives or dies by the airflow it can filter; by adding a celophane panel, you reduce the porous surface area, and thus, the potential efficiency of the bag.
The bags pictured seem to have a relatively small window, which shouldn't cause too much of a problem, but the Bylock-Lewyt Speed-Saks which go with my TableVac have huge clear panels - an entire side of filter-material is lost!
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