How do I replace the cutting line if it gets tangled or empty?

To remove the spool, turn off and unplug the trimmer, press the release tabs on the sides of the spool cover to unlock it. Slide out the old spool. Insert a new pre-wound spool or rewind existing line onto an empty one (Page 12).

From the official Kobalt Kst 120x 06 manual, page 12

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