Which statement describes proper central line (CL) insertion site preparation for patients older than age 2 months? Apply a chlorhexidine-based solution using a back-and-forth gentle friction scrub for at least 30 seconds, and then allow it to air-dry. Apply a chlorhexidine-based solution using a back-and-forth gentle friction scrub for 15 seconds, and then blot dry with a sterile towel. Apply a chlorhexidine-based solution using a circular motion from the center outward, and then allow it to air-dry