A low-engagement email list means many people on it are not opening or clicking your emails, which hurts your results. The best way to clean it up is to first send a re-engagement email asking if they still want to hear from you. Those who do not respond after two or three attempts should be removed. Keeping inactive subscribers hurts your sender reputation and makes email platforms flag your messages as spam. A smaller but active list is always better than a large dead one. Do you think removing inactive subscribers is worth it?