pQbE® Pocket Cleaning System. The pQbE® is a specially-designed, pocket precision wipe system for cleaning fibre optic end faces. Light, convenient and easy to use, pQbE® is ideal for OEM applications as well as for field use. The pQbE® system can be used dry as it is for lighter applications but is best used wet (in conjunction with a cleaning solvent such as Electro-Wash MX). Applications. Cleaning end-face connectors during installation, construction or maintenance Removing buffer gel Splice preparation