Edwin Pawlowski wrote:
"AZ Nomad" wrote in message

If neither steam nor vacuum can free the particles, they won't become
airborn.

Maybe, but there can still be some particulate, like the outgassing of
chemical that you can't vacuum away or steam clean. Depends on what
is actually in there, how well embedded or how fast/slow it is
deteriorating. Running a vacuum cleaner over the carpet for a few
minutes once or twice a week is not the same as exposure 24 hours a
day.

On the other hand, the aged and infirm folks have lived with it for thirty
years - and will do so for another ten - so there's obviously not a problem
for normal folk. Only defective humans need worry.