Seems to be caused by a person who is not related to the heart by not wearing the right outfit with clean room and not to the regulations of the clean room, and out the door only.
Likely due to unauthorized personnel access to the room without wearing costumes that fit into the cleanroom and not out of a cleanroom regulations that provide access to a wide extent. that
Likely due to related persons in and out of the room without wearing a dress that fits into the room a cleanroom and not out according to the regulations of the room cleanroom to access only the door only.