i think u r referring to this one
"Don't try to clean it yourself.
One of the worst things you can do is to try cleaning your air filter with a blast of compressed air. Or by shaking it to get rid of the worst of the dirt before putting it back into its housing. This could loosen abrasive materials trapped in the filter paper, or collected on the outside of the housing, letting them get into the engine, which can do a lot of damage."
https://www.pakwheels.com/forumreply_az_TopicID!43308~ForumID!1~pw.html