Bad vision due to a dirty camera lens is one of the disadvantages and one of the most prominent frustrations in performing endoscopic surgery. Different methods to prevent lens fogging have been described; however, little is published about the prevention of lens contamination due to a dirty port. The authors report three port-cleaning methods: (1) sterile gauze wrapped around an endoscopic dissecting clamp, (2) sterile gauze wrapped around a Pean clamp, and (3) a 10-mm sterile cotton swab, all being simple, adequate, cost-saving solutions.,
Journal of Laparoendoscopic and Advanced Surgical Techniques
Erasmus MC: University Medical Center Rotterdam

Theeuwes, H., Zengerink, H., & Mannaerts, G. (2011). Easy cleaning of the camera port during laparoscopic surgery: Three practical techniques. Journal of Laparoendoscopic and Advanced Surgical Techniques, 21(9), 821–822. doi:10.1089/lap.2011.0200