Disinfecting cap for needleless connectors with multi-part housing and automatic lock

A disinfecting cap for a needleless connector, the cap comprising:

• an outer housing comprising a first end, an open second end, a sidewall extending between the first end and the second end, and at least one outer guide on an inner surface of the sidewall;
• an inner housing comprising a first end, an open second end sized to receive a distal end of the needleless connector, a sidewall extending between the first end and the second end, and at least one inner guide on an outer surface of the sidewall that interacts with the at least one outer guide of the outer housing;
• and
• at least one absorbent member disposed in the inner housing configured to contain a cleaning solution for cleaning and/or disinfecting portions of the needleless connector engaged to the cap,
• wherein movement of the at least one inner guide relative to the at least one outer guide causes the inner housing to move axially into the outer housing and to alternate between rotating in a first direction and rotating in a second direction relative to the outer housing.