Cleaning can cause small amounts of the textured particles to come loose and circulate in the air.
Testing kits are available online and in retail home improvement stores for analysis.
The damp material is less likely to scatter particles.
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Or, leave the ceiling undisturbed to lower the risk of exposure.
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Plus a long-handled duster is very handy for a quick cleaning task like removing a cobweb.
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After cleaning, be sure toclean the feather duster correctly.
Cleaning Tip
Choose a duster that uses synthetic fibers instead of a disposable duster.
The material used for disposable dusters tends to catch on or snag the popcorn particles and break them off.
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Change the sticky sheets often to capture the most soil.